Academic literature on the topic 'Production function (Economic theory)'
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Journal articles on the topic "Production function (Economic theory)"
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Mukhin, А. А. "THE USE OF COBB-DOUGLAS PRODUCTION FUNCTION IN MODELING PRODUCTION PROCESSES." Bulletin of Udmurt University. Series Economics and Law 30, no. 6 (2020): 822–29. http://dx.doi.org/10.35634/2412-9593-2020-30-6-822-829.
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Several alternative economic approaches to the study of organization are discussed in the literature: the neoclassical theory, the theory of transaction costs (the theory of specific assets), the theory of incomplete contracts (the theory of property rights), and the Agency theory (the theory of incentives). Recently, there have been approaches at the intersection of Economics and management: resource theory, knowledge theory, strategic theory, entrepreneurial theory; in the framework of sociology: network theory, the theory of resource dependence, the theory of institutional isomorphism, the theory of situational choice, the theory of strategic choice. The article deals with the basic model of neoclassical theory. The advantage of the neoclassical theory is that it emphasizes the role of technology in General and economies of scale in particular as factors that influence the size of production, turnover of organizations. Within the framework of the considered approach, a certain macrostructure is determined that carries out the costs of economic resources: fixed assets, the number of employees that affect the turnover of organizations. The task of rational economic management, which meets the Udmurt Republic, is to determine the forecast of turnover of organizations with the given resources and to calculate the necessary for its value of fixed assets, the number of employees.
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Grassetti, Francesca, and Gevorg Hunanyan. "On the economic growth theory with Kadiyala production function." Communications in Nonlinear Science and Numerical Simulation 58 (May 2018): 220–32. http://dx.doi.org/10.1016/j.cnsns.2017.06.036.
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Schilir`o, Daniele. "A Glance at Solow’s Growth Theory." Journal of Mathematical Economics and Finance 3, no. 2(5) (2018): 83. http://dx.doi.org/10.14505/jmef.v3.2(5).04.
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This article examines the growth theory of Robert Solow1 , which has been a point of reference of economic growth since the 1950s. First, the article analyzes the path-breaking model of growth contained in Solow’s article “A Contribution to the Theory of Economic Growt” published in The Quarterly Journal of Economics (1956). Second, it looks at the contribution of Solow to growth accounting and to the new method of studying capital formation in economic growth through the vintage ap- proach. Therefore, the work analyzes the article “Technical Change and the Aggregate Production Function” published in The Review of Economics and Statistics (1957). In the latter publication, Solow, through the aggregate production function, tries to measure growth and provide an explanation of the nature of technical progress. The article also examines Solow’s 1960 essay “Investment and Technical Progress” based on the hypothesis of embodied technological progress and the vintage approach.
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Khrushch, L. Z. "Application of duality theory to solve two-criteria problem of linear programming for ecological-economic system." Carpathian Mathematical Publications 10, no. 2 (2018): 324–32. http://dx.doi.org/10.15330/cmp.10.2.324-332.
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In the paper, we investigate two-criterion optimization problem: maximization of one target function and minimization of another target function. To solve the offered two-criterion problem, the method of the main criterion is applied. We consider the problem of production activity of the ecological-economic system with the maximization of the value of the final product as the first target function and the minimization of emissions of polluters into the environment as the second target function. We constructed of two production functions (economic and ecological). To construct the economic production function, we select maximal producing of the final products in a costing form as the most essential (main) criterion. Also, there is introduced the appropriate data of the criterion level total volume of emissions of polluters into the environment. After this two-criteria problem is reduced to one-criteria problem. For the construction of ecological production function, the main criterion in the problem of the minimal general volume of emissions of polluters into the environment is defined. We use a parameter of the criterion level of the second criterion and obtained one-criterion problem. Therefore, investigation of the appropriate dual problems explicitly provides economic and ecological production functions to the deduced one-criterion problems. These functions in input two-criterion problem give way to optimal manage of ecological-economic system.
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Cheng, Maolin, and Zedi Jiang. "A New Class of Production Function Model and Its Application." Journal of Systems Science and Information 4, no. 2 (2016): 177–85. http://dx.doi.org/10.21078/jssi-2016-177-09.
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AbstractUnder some circumstances, the studies on economic growth theory can be translated into the researches on production function which will beneficial for the government to analyze the pattern of economic growth and then make reasonable policies. The commonly used production functions include C-D production function, CES production function, VES production function with different elasticity of substitution. This paper will put forward to a new class of production function which elasticity of substitutionσis a non-linear function ofK/L. With this new model, a calculation formula for accurately measure the influence rates of various factors to economic growth will be derived, which is significant for in-depth studies on functions and scientific measurement. The empirical analysis on the influence rates of China’s economic growth factors and its good results will be presented in the end of this paper.
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Zhang, Wei-Bin. "A Discrete Two-Sector Economic Growth Model." Discrete Dynamics in Nature and Society 2007 (2007): 1–13. http://dx.doi.org/10.1155/2007/89464.
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This paper studies a key model in economic theory—the two-sector growth model—with an alternative utility function. We show that the system has a unique stable equilibrium when the production functions take on the Cobb-Douglas form. We also simulate the model and demonstrate effects of changes in some parameters.
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Cromley, R. G., and D. M. Hanink. "A Financial-Economic von Thünen Model." Environment and Planning A: Economy and Space 21, no. 7 (1989): 951–60. http://dx.doi.org/10.1068/a210951.
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The von Thünen model of agricultural land use is reformulated in this paper as an investment decision in which the objectives of farmers range from total risk-aversion to profit-maximization. By means of a variant of the mean-variance model of contemporary portfolio theory, it is demonstrated that individual bid-rent functions depend on the nature of a farmer's utility function. Because farmers' objectives affect their bid-rent functions, the spatial pattern of agricultural production is also affected. The conventional result of the von Thünen model is shown to be a special case of the more general portfolio model.
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Klump, Rainer, and Chris Papageorgiou. "Editorial introduction The CES production function in the theory and empirics of economic growth." Journal of Macroeconomics 30, no. 2 (2008): 599–600. http://dx.doi.org/10.1016/j.jmacro.2007.12.004.
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Kleiner, George. "Universal system of the production factors." Economics and the Mathematical Methods 58, no. 2 (2022): 22. http://dx.doi.org/10.31857/s042473880020011-1.
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In this article, based on the new theory of economic systems, we propose a universal concept of the factors of economic activity, suitable for modeling economic systems of various scales, nature, and purpose. The concept described in the article indicates the objective genesis of a unified system of aggregated factors of production, particular cases of which are the classical theory of factors of production, marginal theory of factors, and intellectual theory of factors. The first case is characteristic of the industrial economy; the second is characteristic of the industrial and post-industrial economy; the third is characteristic of the knowledge economy and the intellectual economy. At the same time, we refine the concept of a factor of production and a system of factors, representing a set of independent processes that are generally necessary and sufficient for the implementation of production and have a similar aggregation level to a description of the results of economic activity. When developing a universal system of factors of production, we also modernize the concept of an economic phenomenon and the economic space-time that serves as a container for these phenomena. Thus, economic space-time is like the physical space-time, at each point of which the reserves of substance (in the economic space — goods) and energy (in the economic space — the ability to use space-time resources effectively) are concentrated. The possibilities of conjugation of the action of internal and external universal factors on the enterprise functioning are explored. An example of constructing a parametric production function based on a system of universal factors of production is given.
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Altman, Morris. "Implications of smart decision-making and heuristics for production theory and material welfare." Mind & Society 18, no. 2 (2019): 167–79. http://dx.doi.org/10.1007/s11299-019-00219-y.
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Abstract Conventional theory assumes that economic agents perform at optimal levels of efficiency by definition and this is achieved when individuals behave in a particular fashion. Moreover, neoclassical production theory masks the process by which optimal output can be achieved. I argue that economic theory should be revised to incorporate some key findings of behavioural economics, while retaining the conventional theory’s normative ideal of optimum output whilst rejecting its normative procedural ideals of how to achieve optimality in production. I argue that neoclassical procedures can be expected to yield sub-optimal levels of output and therefore should not be benchmarks for procedural rationality. I present an alternative more realistic and analytically precise specification of the production function related to the fast and frugal heuristics narrative pioneered by Gigerenzer and Leibenstein’s x-efficient theory. This approach incorporates an understanding of the appropriate procedures, psychological and organization variables, decision-making capabilities and end-goals required to achieve optimality in production and, thereby, grow the wealth of nations, thereby enhancing the material wellbeing of the population at large. This also provides us with the tools to better identify economic inefficiency and the conditions that contribute to it.
Dissertations / Theses on the topic "Production function (Economic theory)"
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Nuchsuwan, Kontee. "Essays in trade, development and political economy." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2005. http://catalog.hathitrust.org/api/volumes/oclc/71215402.html.
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Elasra, Amira. "Essays on educational production functions in England." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7551/.
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Despite the expansion of the literature on the implications that different inputs have on the educational outcomes of students, empirical research has so far lacked the full capacity to provide unequivocal findings. Essentially, this deficiency is mainly attributed to two main factors; the lack of reliable data and the lack of full dimensionality in the theoretical model adopted to explain such data (Levaččićć and Vignoles, 2002; Knoeppel, Verstegen, and Rinehart, 2007). This dissertation aims to fill those gaps by first building a unique large dataset that covers all aspects of the educational process and second by adopting an integrated theoretical model and advanced quantitative methodological approaches to analyze it. With the fulfillment of such aim the dissertation manages to fill some of the gaps identified in the Education Economics literature related to the relationships between the cognitive and affective educational outcomes of English adolescents on one hand and three main inputs representing each of the three indentified factors in the theoretical model on the other hand controlling for other possible heterogeneities. Specifically, the thesis examines the effect of school process inputs in Chapter 2, family structure as a key family background input in Chapter 3 and finally religion and religiosity as a key adolescent’s personal input in Chapter 4.
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Mendoza, Maria Nimfa F. "Essays in production theory : efficiency measurement and comparative statics." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/30734.
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Nonparametric linear programming tests for consistency with the hypotheses of technical efficiency and allocative efficiency for the general case of multiple output-multiple input technologies are developed in Part I. The tests are formulated relative to three kinds of technologies — convex, constant returns to scale and quasiconcave technologies. Violation indices as summary indicators of the distance of an inefficient observation from an efficient allocation are proposed. The consistent development of the violation indices across the technical efficiency and allocative efficiency tests allows us to obtain comparative measures of the degrees of technical inefficiency and pure allocative inefficiency. Constrained optimization tests applicable to cases where the producer is restricted to optimizing with respect to a subset of goods are also proposed. The latter tests yield the revealed preference-type inequalities commonly used as tests for consistency of observed data with profit maximizing or cost minimizing behavior as limiting cases. Computer programs for implementing the different tests and sample results are listed in the appendix.
In part II, an empirical comparison of nonparametric and parametric measures of technical progress for constant returns to scale technologies is performed using the Canadian input-output data for the period 1961-1980. The original data base was aggregated into four sectors and ten goods and the comparison was done for each sector. If we assume optimizing behavior on the part of the producers, we can reinterpret the violation indices yielded by the efficiency tests in part I as indicators of the shift in the production frontier. More precisely, the violation indices can be considered nonparametric chained indices of technical progress. The parametric measures of technical progress were obtained through econometric profit function estimation using the generalized McFadden flexible functional form with a quadratic spline model for technical progress proposed by Diewert and Wales (1989). Under the assumption of constant returns, the index of technical change is defined in terms of the unit scale profit function which gives the per unit return to the normalizing good. The empirical results show that the parametric estimates of technical change display a much smoother behavior which can be attributed to the incorporation of stochastic disturbance terms in the estimation procedure and, more interestingly, track the long term trend in the nonparametric estimates.
Part III builds on the theory of minimum wages in international trade and is a theoretical
essay in the tradition of analyzing the effects of factor market imperfections on resource allocation. The comparative static responses of the endogenous variables — output levels, employment levels of fixed-price factors with elastic supply and flexible prices of domestic resources — to marginal changes in the economy's exogenous variables — output prices, fixed factor prices and endowments of flexibly-priced domestic resources -— are examined. The effect of a change in a fixed factor price on other flexible factor prices can be decomposed Slutsky-like into substitution and scale effects. A symmetry condition between fixed factor prices and flexible factor prices is obtained which clarifies the concepts of "substitutability" and "complementarity" between these two kinds of factors. As an illustration, the model is applied to the case of a devaluation in a two-sector small open economy with rigid wages and capital as specific factors. The empirical implementation of the general model for the Canadian economy is left to more able econometricians but a starting point can be the sectoral analysis performed in Part II.<br>Arts, Faculty of<br>Vancouver School of Economics<br>Graduate
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Fortin, Nicole M. "Evaluating the aggregation biases in a production economy : a stochastic approach." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28779.
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This dissertation presents a theoretical framework to analyze and evaluate aggregation biases. These biases measure the information lost when macro relations evaluated in terms of aggregates do not capture all of the distributional properties of micro relations. The framework is developed in the context of producer theory, but it may be used to determine the biasedness of any representative agent model and to study general relationships between exact-aggregation macro parameters and their microfoundations.
The model is based on a stochastic interpretation of the production characteristics which encompasses that of previous stochastic aggregation models (Houthakker, 1955; Hildenbrand, 1981; Stoker, 1984; Lewbel, 1986a). It admits the construction of "true" aggregate relations which can be compared to pre-specifed macro relations. Many of Theil's (1954, 1971) statistical results concerning the relations between micro and macro parameters then can be formalized at the population level and generalized to non-linear functions. A moments decomposition of the "true" aggregate relation makes it possible to identify the sources and causes of potential aggregation biases. Thus, the functional-form restrictions of exact-aggregation models (Gorman, 1968a; Blackorby and Schworm, 1984, 1988) are found to be neither necessary nor sufficient conditions for consistent aggregation, if the aggregates are taken to be the usual totals or averages. Traditionally, similarity among firms, either as a maintained hypothesis or as the long-run outcome of perfect competition, has proved to ensure exact aggregation. Here, economic diversification may also provide an alternative set of circumstances under which the aggregation biases may be minimized.
In the case of an average-representative firm, the output aggregation bias is explicitly derived. Empirical analyses confirm that the magnitude of the bias increases as higher moment terms in the production characteristics increase in importance. Conditions under which exact-aggregation macro parameters possess stable microdefinitions are obtained; they explain Fisher's (1971) simulation results. Empirical results show that such macro parameters are relatively stable (within the estimated confidence intervals) when based on periods of relative economic stability. Finally, theoretical implications for macroeconometric modeling and policy evaluation are explored.<br>Arts, Faculty of<br>Vancouver School of Economics<br>Graduate
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Marroquin, Jacklin Beatriz. "Examination of North Dakota's Production, Cost, and Profit Functions: A Quantile Regression Analysis." Thesis, North Dakota State University, 2008. https://hdl.handle.net/10365/29736.
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This thesis estimates the production, cost, and profit functions for North Dakota agriculture using state-level input-output quantity and price data for the period 1960-2004. A Cobb-Douglas functional form with Hick-neutral technology change is used to measure the contribution of capital, land, labor, materials, energy, and chemical inputs quantities and output quantity using the primal production function; contribution of capital quantity, land quantity, output quantity, labor price, materials price, energy price, and chemical price to cost using the dual restricted cost function; and the contribution of capital quantity, land
quantity, labor price, materials price, energy price, chemical price, output price to profit using the dual restricted profit function. In contrast to previous studies, quantile regression is used to explore the linear or nonlinear relationship between the independent and dependent variable by estimating parameter coefficients at each quantile using time-series data. Empirical findings suggest the cost function is the best model to examine the relationship between input prices, output quantity and cost using quantile regression for North Dakota agriculture, Further, the quantile regression suggests a linear and non-linear
relationship between cost and certain independent variables.
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Gustafsson, Martin Anders. "School production modelling to strengthen government monitoring programmes in developing countries." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/2683.
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Thesis (MEcon)--University of Stellenbosch, 2006.<br>Education production function analysis is widely recognised as one important area of
research that needs to inform education policymaking, specifically policy relating to
the mix of funded inputs in a schooling system. Arriving at production functions is a
complex task, and is fraught with methodological pitfalls. This thesis sets out to
establish a framework for undertaking education production function analysis, and in
discussing its various elements, including its pitfalls, recommendations for good
practice are arrived at. The material analysed is of four types: texts on econometric
theory; existing production function analyses; documentation relating to three dataintensive
school monitoring programmes, namely Brazil’s SAEB, South Africa’s
Systemic Evaluation and the international SACMEQ programme; and lastly data,
relating mainly to South Africa, from the 2000 run of SACMEQ. The thesis is
organised according what can be regarded as seven key analysis steps. These steps
include a focus on the importance of a ‘mental model’, the relative benefits of the
one-level regression model and the hierarchical linear model (HLM), and the
formulation of actual production functions for South Africa based on the SACMEQ
data, using both one-level and HLM models. Key conclusions are, firstly, that the
HLM, though still under-developed, offers great analysis potential and, secondly, that
production function analyses ought to be translated into budgetary terms in order for
them to become fully meaningful to the policymaker.
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Hajargasht, Gholamreza. "Non- and semi-parametric stochastic frontiers : a penalised spline approach /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19533.pdf.
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Keller, Joachim. "Essays on innovation and investment decisions under imperfect competition." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209548.
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Innovation incentives are imperfectly provided in market settings: When deciding on their innovation activity, firms tend to focus on the maximization of their private benefits, poorly internalizing social benefits. This thesis analyzes how policy intervention could be designed in order to align private and social incentives. <p><p>In the three papers of this thesis, I will consider three environments where firms' choices in a laissez-faire situation may be socially inefficient. The inefficiencies arise because of learning externalities, free riding when the innovation decision is made by a group of participants, or because firms are not willing to invest in a new activity that has a higher social than private value.<p><p>In the first thesis paper, I deal with the strategies of firms in innovative consumer product markets characterized by demand uncertainty. I analyze the timing and location decision of firms in that context.<p><p>In the second thesis paper, I consider the investment incentives of financial market infrastructures (FMIs). FMIs comprise the set of institutions that allow financial market participants to engage with each other. I assess the innovation incentives for different forms of ownership (user-owned versus third-party owned) and identify infrastructure service provision equilibria. <p><p>In the third thesis paper, I address the question of how a government should allocate a subsidy budget over time in order to maximize the innovation activity in an industry.<br>Doctorat en Sciences économiques et de gestion<br>info:eu-repo/semantics/nonPublished
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Martello, Raphael Cravo Silva. "Produto potencial e política monetária no Brasil." reponame:Repositório Institucional do FGV, 2013. http://hdl.handle.net/10438/11113.
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Previous issue date: 2013-08-19<br>This work aims to analyze an alternative method for estimating the potential GDP in Brazil using a model with two sectors. This paper replicates a work by Basu & Fernald (2009) for the U.S. economy. Despite some strong assumptions, the results show gains in forecasting potential output in the long run by using a model with two sectors, investment and consumption. For the short term neither model replicate the data of the Brazilian economy.<br>Este trabalho tem como objetivo analisar um método alternativo de estimação do PIB potencial brasileiro através do uso de um modelo com dois setores em trabalho feito por Basu & Fernald (2009) para a economia americana. Apesar de alguns pressupostos fortes, os resultados apontam para ganhos de previsão do produto potencial no longo prazo ao se utilizar um modelo com 2 setores, um de investimento e outro de consumo. Para o curto prazo nem o modelo com 2 setores nem com 1 setor parece replicar os dados da economia brasileira.
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Todorova, Zdravka K. Lee Frederic S. "Reconsidering households in economic theory." Diss., UMK access, 2007.
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Thesis (Ph. D.)--Dept. of Economics. University of Missouri--Kansas City, 2007.<br>"A dissertation in economics and social science consortium." Advisor: Frederic S. Lee. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed Dec. 19, 2007. Includes bibliographical references (leaves 216-240). Online version of the print edition.
Books on the topic "Production function (Economic theory)"
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Dipak, Ghosh. Production function underlying Kaldor's technicalprogress function. University of Stirling, Department of economics, 1993.
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Dipak, Ghosh. Production function underlying Kaldor's technical progress function. University of Stirling, Department of Economics, 1991.
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Sheikh, Ahmed El. Structural analysis for the production function of the Sudan economy. Development Studies and Research Centre, Faculty of Economic & Social Studies, University of Khartoum, 1986.
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Chung, Jae Wan. Utility and production functions: Theory and applications. Blackwell, 1994.
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Colombier, Carsten. Spezifikation einer Produktionsfunktion mit einem nichtrival nutzbaren Produktionsfaktor. Duncker & Humblot, 2001.
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Fisher, Franklin M. Aggregation: Aggregate production functions and related topics. MIT Press, 1993.
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Fisher, Franklin M. Aggregation: Aggregate production functions and related topics. Harvester Wheatsheaf, 1992.
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May, Eugen. Dynamische Produktionstheorie auf Basis der Aktivitätsanalyse. Physica-Verlag, 1992.
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F, Yanagida John, ed. Production economics: Mathematical development and applications. Transaction Books, 1985.
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Ouyang, Cherng-shin. Neo-Austrian model of production. Chung-hua Institution for Economic Research, 1988.
Find full textBook chapters on the topic "Production function (Economic theory)"
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Choudhury, Masudul Alam. "Production Function." In Comparative Economic Theory Occidental and Islamic Perspectives. Springer US, 1999. http://dx.doi.org/10.1007/978-1-4757-4814-7_8.
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Sakashita, Noboru. "Production Function, Demand Function and Location Theory of the Firm." In Optimum and Equilibrium for Regional Economies. Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80135-8_2.
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Podczeck, Konrad. "Quasi-Equilibrium and Equilibrium in a Large Production Economy with Differentiated Commodities." In Functional Analysis and Economic Theory. Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-72222-6_14.
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Muth, John F. "A Stochastic Theory of the Generalized Cobb-Douglas Production Function." In Cost Analysis Applications of Economics and Operations Research. Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-6384-2_5.
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Murray Svidroňová, Maria, Juraj Nemeč, and Gabriela Vaceková. "Co-production of public goods in Slovakia." In New perspectives in the co-production of public policies, public services and common goods. CIRIEC, 2022. http://dx.doi.org/10.25518/ciriec.css3chap7.
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Public-Owned Enterprises (POEs) are generally large economic enterprises owned and governed by state institutions. POEs generally are the sole or the main provider of the key public goods and services as water, electricity, transport, telecommunications, and postal services. If administered efficiently, the POEs are important for national development and perspective of natural economic resources. The concern is how accurately these monopolistic enterprises are organized in aspects of administrative and managerial perspectives to function as effectively as possible for the objectives they are created. Therefore an overall summary of the public-owned enterprises is presented through their process of emerging, privatization, and evolution in Albania, southeast Europe. The process was accompanied by shortcomings due to its ad-hoc nature; and associated with negative effects of bad management, governance corruption, and low efficiency of the operational activities and results.
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Shaikh, Anwar. "Humbug production function." In Capital Theory. Palgrave Macmillan UK, 1990. http://dx.doi.org/10.1007/978-1-349-20861-6_15.
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Bauby, Pierre. "After the Keynesian paradigm and the paradigm of economic liberalism, a new paradigm based on "values"?" In New perspectives in the co-production of public policies, public services and common goods. CIRIEC, 2022. http://dx.doi.org/10.25518/ciriec.css3chap8.
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Public-Owned Enterprises (POEs) are generally large economic enterprises owned and governed by state institutions. POEs generally are the sole or the main provider of the key public goods and services as water, electricity, transport, telecommunications, and postal services. If administered efficiently, the POEs are important for national development and perspective of natural economic resources. The concern is how accurately these monopolistic enterprises are organized in aspects of administrative and managerial perspectives to function as effectively as possible for the objectives they are created. Therefore an overall summary of the public-owned enterprises is presented through their process of emerging, privatization, and evolution in Albania, southeast Europe. The process was accompanied by shortcomings due to its ad-hoc nature; and associated with negative effects of bad management, governance corruption, and low efficiency of the operational activities and results.
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Heijman, W. J. M. "Theory of Production." In The Economic Metabolism. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5038-5_2.
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Bance, Philippe, and Angélique Chassy. "Comparative analysis of Public-Social and Solidarity Economy Partnerships (PSSEPs) in the French Regions after the Hamon and NOTRé Laws." In New perspectives in the co-production of public policies, public services and common goods. CIRIEC, 2022. http://dx.doi.org/10.25518/ciriec.css3chap11.
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Public-Owned Enterprises (POEs) are generally large economic enterprises owned and governed by state institutions. POEs generally are the sole or the main provider of the key public goods and services as water, electricity, transport, telecommunications, and postal services. If administered efficiently, the POEs are important for national development and perspective of natural economic resources. The concern is how accurately these monopolistic enterprises are organized in aspects of administrative and managerial perspectives to function as effectively as possible for the objectives they are created. Therefore an overall summary of the public-owned enterprises is presented through their process of emerging, privatization, and evolution in Albania, southeast Europe. The process was accompanied by shortcomings due to its ad-hoc nature; and associated with negative effects of bad management, governance corruption, and low efficiency of the operational activities and results.
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Ülgen, Faruk. "Renewal of Public Action." In New perspectives in the co-production of public policies, public services and common goods. CIRIEC, 2022. http://dx.doi.org/10.25518/ciriec.css3chap9.
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Public-Owned Enterprises (POEs) are generally large economic enterprises owned and governed by state institutions. POEs generally are the sole or the main provider of the key public goods and services as water, electricity, transport, telecommunications, and postal services. If administered efficiently, the POEs are important for national development and perspective of natural economic resources. The concern is how accurately these monopolistic enterprises are organized in aspects of administrative and managerial perspectives to function as effectively as possible for the objectives they are created. Therefore an overall summary of the public-owned enterprises is presented through their process of emerging, privatization, and evolution in Albania, southeast Europe. The process was accompanied by shortcomings due to its ad-hoc nature; and associated with negative effects of bad management, governance corruption, and low efficiency of the operational activities and results.
Conference papers on the topic "Production function (Economic theory)"
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Artemenko, T. V. "THE SIGNIFICANCE OF THE COMPANY'S FOREIGN ECONOMIC ACTIVITY: THEORY AND PRACTICE." In New forms of production and entrepreneurship in the coordinates of neo-industrial development of the economy. PD of KSUEL, 2020. http://dx.doi.org/10.38161/978-5-7823-0731-8-2020-081-090.
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The article considers various options for determining the significance of the foreign economic activity of an enterprise, including the implementation of the main functions or development strategies of an enterprise, depending on the motives of foreign economic activity. Six levels of manifestation of the effect of the foreign economic activity of a single enterprise are identified: the level of the enterprise, regional, sectoral, national, supranational levels, the level of the world economy. Briefly characterized are the areas of manifestation of the effect of the foreign economic activity of the enterprise, such as budget, production, investment, social, other. The nature of the manifestation of the effect (direct, indirect) and its orientation (positive, negative) are indicated.
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DasNeogi, Protyusha, Elizabeth Cudney, Akim Adekpedjou, and Rodney Kestle. "Comparing the Predictive Ability of T-Method and Cobb-Douglas Production Function for Warranty Data." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12668.
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Predictive models are used in an attempt to anticipate future transitions, mitigate losses, and maximize economic gains. In today’s market, companies look for high reliability and quality of products due to great market competition. Hence warranty data is of considerable interest to companies. Warranty shows the ability of a system or component to perform its functions within a given customer usage. Many statistical and data mining methods are available to predict the warranty data. This study focuses on analyzing the predictive efficiency of the T-method and Cobb-Douglas production function on warranty data by comparing their prediction capability. The T-method, developed by Genichi Taguchi, is founded upon the fundamentals of the Taguchi System of Quality Engineering which is used to calculate an overall prediction based on signal-to-noise ratio. Using this method, the required parameters are calculated to obtain an overall estimate of the true value of the output for each signal member. The Cobb-Douglas production function is then applied on the same dataset. In economics, the Cobb-Douglas functional form of production function is widely used to represent the relationship of the output to inputs. The strength of the relationship is then assessed using the R-squared and adjusted R-squared values.
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Choroev, Kalybek. "Econometric Models of Structural Shifts of the Economy of the Kyrgyz Republic." In International Conference on Eurasian Economies. Eurasian Economists Association, 2021. http://dx.doi.org/10.36880/c13.02530.
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One of the urgent problems of economic development in the Kyrgyz Republic is overcoming structural imbalances. This article is devoted to the analysis and econometric modeling of the problems of overcoming structural imbalances in economic development. Methods for analyzing structural changes in the national economy using an econometric model based on a production function are proposed. The necessity of developing a three-sector model based on the production function has been substantiated. Analyzed the state of socio-economic development, the state of the investment climate in the Kyrgyz Republic.
 Currently, one of the most difficult problems of economic reforms in countries with economies in transition is that they are faced with the task of overcoming complex structural imbalances in the economic system inherited from the planned economy of the past. Ensuring sustainable balanced economic development of the country is an urgent task. For the accelerated development of the national economy of the country, the main goal is to optimize the intersectoral and intra-sectoral distribution of resources. In a transitional economy, the market mechanism cannot provide the desired scheme for the intersectoral allocation of resources of the national economy.
 The government of the country must take into account the existence of economic imbalances at the macro level and in the future, it is necessary to coordinate the distribution of foreign investment resources at the state level. Optimization measures should be aimed at identifying economic imbalances at an early stage and taking measures to resolve them in a timely manner.
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Yilan, Gulsah, Arif Ozcan, and Tanju Caglar. "Sustainable cardboard label production." In 10th International Symposium on Graphic Engineering and Design. University of Novi Sad, Faculty of technical sciences, Department of graphic engineering and design,, 2020. http://dx.doi.org/10.24867/grid-2020-p14.
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Recently, all industrial sectors have shown significantly increasing attention in reaching the sustainability goals regarding economic, environmental, social, and also technological aspects not only at the regional level but also nationwide and even global scale. Aside from being an economically popular concept, sustainability is strictly related to effective resource use and efficient waste disposal. Thus, it functions as a complementary issue to be considered in various production activities. The sustainable production approach includes reducing or (if possible) eliminating the negative impacts on the human health and environment, reducing the waste generated, increasing the recycling rate, and developing energy and material saving processes. The printing industry is one of the most important industries in reaching sustainable production goals. The need for the printed products, which is the focus of this study, is increasing in parallel with the changing consumer expectations and technological developments. However, from the point of the printing industry view, a solid sustainability consensus is not settled among the practitioners, yet. This study aims to evaluate the sustainability of the cardboard label production considering several combinations of raw materials such as paper, ink, and surface coating additives via appropriate Multi-Criteria Decision Analysis (MCDA) methods. The most frequently used paper and ink types are considered with three alternatives for each. To indicate the sustainability scores economic, environmental, and social evaluation criteria are selected. By applying the Multi-Attribute Utility Theory (MAUT), the sustainability score of each label is calculated to determine the optimum alternative in terms of the production process and also the material used. This evaluation provides detailed information to the producer and also to the consumer about the alternative production routes to use less energy and raw material, and also to decrease the environmental impacts while sustaining the economic feasibility. Besides, alternative solutions are offered to reach sustainability goals by considering the economic and environmental life cycle impacts of these materials. Hence, an increase in awareness about the printing industry and service channels is expected. Moreover, this study is also important in presenting the applicability of sustainability assessments in the printing industry.
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Zhao, Dianhong. "Study on the evolution of rural land use function in developed areas of China." In Post-Oil City Planning for Urban Green Deals Virtual Congress. ISOCARP, 2020. http://dx.doi.org/10.47472/xgnq9142.
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Under the background of "zero growth" of land use, there are many researches and explorations on the stock renewal of central urban areas in traditional planning. However, in recent years, the rural-led stock land use planning has attracted more and more attention with the development of land space planning. Village area is the basic unit of rural social and economic activities in China. The rational play of land use function in village area has important theoretical and practical significance for the realization of the multi-objective of rural revitalization under ecological civilization. Department of natural resources has issued the work pilot implementation of global land comprehensive improvement notice, rural red line "no increase of the aggregate land for construction purposes, ecological protection not breakthrough", so without any increase in construction land index on the basis of further promote rural land use composite function, is to solve the rural economy development and the important direction of rural land supply contradictions. This paper firstly makes a qualitative theoretical study on the compound mechanism of land use function in villages, and then takes 4 villages in southern Jiangsu province as examples to elaborate the compound mechanism of land use function in the development process. The results show that: (1) land use function changes due to its type and land use mode, and is indirectly influenced by natural resource endowment, social and economic conditions, regional policies, etc., the compound trend of land use function in different types of villages is often different; The land use function of the four villages in the town is as follows: the production function is transformed into the production-ecological composite function, and the living function is transformed into the production-life composite function. (3) summarize the planning of the basic ideas and function of the complex process, refine the agricultural land, unused land and construction land has the implementation of the functional complex strategy.
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JELOČNIK, Marko, Lana NASTIĆ, and Jonel SUBIĆ. "PROCESSING OF PORK MEAT IN THE FUNCTION OF VALUE-ADDED CREATION AT THE FAMILY FARMS." In Competitiveness of Agro-Food and Environmental Economy. Editura ASE, 2022. http://dx.doi.org/10.24818/cafee/2020/9/10.
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Creation of value-added at the farms could play great role in strengthening of their economic sustainability. Serbia has long tradition in pig farming. This subsector of agriculture in last few decades is facing the negative trend in production capacities (decrease in active farms and number of pigs) and it is mainly based on economically weak family farms characterized by small number of pigs. On the other hand it is obvious the strengthening of their specialization to pig farming. This line of agricultural production is specifically under the higher production risks mainly influenced by pork cycle and some market risks. Thus, the often and expressed price oscillation affects primarily the sustainability of small farms, disabling the proper planning of production and endangering their survival. Processing of pork meat at small family farms could be a good solution for income stabilization, where created value added could induce better competitiveness of the farms. The main goal of the paper is to present the economic potential of the conduction of pork meat processing at small family farms, in scenarios with or without of employment of external labour. In this context, it was used the analytical calculations based on variable costs (contribution margin). Gained results show that comparing to pig growing, organization of mentioned activity will significantly increase the farm incomes in both cases, impacting the many positive effects on farm sustainability.
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GUO, YIJIA, and YI WEI. "ANALYSIS OF RURAL REVITALIZATION PATHS BASED ON THE MULTI-FUNCTIONAL EVALUATION: A CASE STUDY OF 101 TOWNS IN LIAOCHENG, CHINA." In 2021 INTERNATIONAL CONFERENCE ON ADVANCED EDUCATION AND INFORMATION MANAGEMENT (AEIM 2021). Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/dtssehs/aeim2021/35978.
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Abstract. The objective assessment of rural multi-functionality is the key to formulating rural development strategies. This paper constructs a rural multi-functional evaluation index system to evaluate the multi-functional values of production, life and ecology of 101 towns in Liaocheng City, Shandong Province. Based on survey data, multi-source spatial data and statistical data, draw a radar map of the multi-functional development model of the town. The results show that: (1) There are significant differences in the multi-functional development of 101 towns in Liaocheng. According to the average value, the order is ecological function (0.3755)>life function (0.2418)>production function (0.1556). Rural areas generally lag behind in terms of production function. (2) Ecological high-value areas are relatively evenly distributed in all districts and counties. High-value production areas are mainly located around Dongchangfu District. High-value areas for living functions are mainly located around the central urban areas of Dong'e County, Chiping District and Dongchangfu District. (3) It can be divided into three types: balanced, compound and dominant. Among the subdivision models, there is still no high-equilibrium model with a higher degree of development. Low-equilibrium and traditional townships account for 52% of the total evaluation objects. According to the evaluation and classification results, the article analyzes the influence of central city radiation effect, economic foundation, cultural atmosphere, etc. on rural multi-functionality. Combining the practice of agricultural land reform and rural asset activation, the article discusses the multi-functional development path of different types of rural development, which provides scientific advice for promoting rural transformation and development and promoting rural revitalization.
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Gilardone, Carlos R., Carlos A. Canel, Luisa Albuquerque, Manuel I. Ruiz Benitez, and Ariel Cabello. "Vaca Muerta's Productivity and Economic Performance. 7 Years in Review." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206344-ms.
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Abstract Vaca Muerta is an unconventional reservoir located in Argentina. Since 2014, 397 horizontal wells have been drilled in this formation. The scope of this paper is to summarize the evolution of the productivity and the economics of these wells from 2014 until 2020. The methodology consisted in analyzing the results of the wells grouped by drilling campaign extracting the main parameters such as peak oil rate, cumulative oil at 365 days, number of fracture stages and length of the drain. After the extraction of these parameters we calculated each well's EUR using a modified hyperbolic function. A statistical analysis of the results was performed in order to calculate a "Type Well" for each drilling campaign. An economic evaluation for each campaign was then generated in order determine the "Type Well" economics. Once this was achieved we calculated the production profile of an "Economic Type Well" for each campaign defining this as the well which would generate an NPV=0$ at a discount rate of 10%. This was used to determine how many wells were economical for each year. The results of this study show the big impact on the productivity generated by the increase in well length and the number of frac stages revealing the progression of the "Learning curve" for the Vaca Muerta basin including the reduction in Capital Expenditures per well. At present, Vaca Muerta represents an opportunity as a profitable play due to the high productivity of the reservoir and low risk. Nevertheless, there is still room for improvement in the wells' cost according to the results of this study. This paper presents the evolution of the economics and the risk performance of Vaca Muerta.
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Šneler, Filip, Gordana Brcković, and Trina Mjeda. "Evaluating Environmentally Sustainable Production Practices in Rural Areas." In 7th International Scientific Conference ERAZ - Knowledge Based Sustainable Development. Association of Economists and Managers of the Balkans, Belgrade, Serbia, 2021. http://dx.doi.org/10.31410/eraz.2021.299.
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Forests and forestry are the ecological and economic infrastructure of every state. The EU strategy for the forest-based sector is particularly related to rural development, since, in such areas, forests are mostly spread, thus representing an opportunity for more balanced development, or in other words - survival of rural areas. Croatia is no exemption. The goal of forest management in the Republic of Croatia is the sustainable and harmonious use of all forest functions and the permanent improvement of their condition, by promoting environmentally sustainable production practices in such a way that the local or rural environment has financial benefits. Looking at forests as perfect factories, ranging from the production of wood pulp as raw materials, oxygen and food, water purifiers, carbon tanks and all the way to the intangible and generally useful functions of forests, it is necessary to observe their all-encompassing importance. We are facing global climate change, which significantly influences the restoration and erection of new forest stands, that is one of the most important procedures for sustainable forest management in Croatia. Current techniques and knowledge that are being applied contribute to discouraging results, therefore it is crucial to introduce and promote new environmentally friendly practices, aiming to increase the productive function of forest land and forest as an ecosystem. In accordance with the sustainable development of forest land, research was conducted in the lowland part of Sisak-Moslavina County in Croatia. The aim of the research is to study the cost-effectiveness and compare the adaptation of new methods and practices of reforestation, with the end result of the forested area as a production unit, and that was conducted working on two land sections. On the surface of the first section, which was previously chemically prepared, a classic renovation was performed by sowing acorns employing a spreader. The acorn was collected by the local population. Processing of the second section included planting seedlings, while the section was previously mechanically prepared by grinding biomass and an integral method of soil preparation in rows with a spacing of 3 m. The internal planting distance between the plants was 0.80 - 1.0 m, and work was carried out with the help of external contractors, the local population. The use of new environmentally sustainable technologies has resulted in 29% higher financial costs of forestation. However, using new practices compared to the classical ones, the financial viability in terms of economic profit of the rural area was determined. The application of new silvicultural practices is initially more expensive, but results in a shorter period of time to achieve targeted results, while the increase in costs refers to the involvement of the local community that participated in the works.
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Mansilla, Christine, Michel Dumas, and Franc¸ois Werkoff. "A Techno-Economic Optimization of the Power Conversion System of a Very High Temperature Reactor." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89155.
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Generation IV nuclear reactors will not be implemented unless they enable lower production costs than with the current systems. In such a context a techno-economic optimization method was developed and then applied to the power conversion system of a very high temperature reactor. Techno-economic optimization consists in minimizing an objective function that depends on technical variables and economic ones. The advantage of the techno-economic optimization is that it can take into account both investment costs and operating costs. A techno-economic model was implemented in a specific optimization software named Vizir, which is based on genetic algorithms. The calculation of the thermodynamic cycle is performed by a software named Tugaz. The results are the values of the decision variables that lead to a minimum cost, according to the model. The total production cost is evaluated. The influence of the various variables and constraints is also pointed out.
Reports on the topic "Production function (Economic theory)"
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Dhyne, Emmanuel, Amil Petrin, Valerie Smeets, and Frederic Warzynski. Theory for Extending Single-Product Production Function Estimation to Multi-Product Settings. National Bureau of Economic Research, 2022. http://dx.doi.org/10.3386/w30784.
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Bazer, Fuller W., Arieh Gertler, and Elisha Gootwine. Role of Placental Lactogen in Sheep. United States Department of Agriculture, 2001. http://dx.doi.org/10.32747/2001.7574339.bard.
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Central problems in sheep and dairy cattle production are reproductive failure due to embryonic/fetal mortality and low birth weights, especially in prolific breeds, and reduced milk yields which adversely affect neonatal survival and economy of production. The sheep placenta expresses lactogenic (ovine placental lactogen, oPL) and somatogenic (ovine placental growth hormone, oGH) hormones. Our research has focused on the biological roles of oPL and oGH in function of the uterine endometrium during gestation and the mammary gland during pregnancy and lactation. Major conclusions were that: ( 1 ) immunization of prepubertal ewes against oPL resulted in increased birth weights of their lambs and their milk production during lactation; (2) neither oPL nor oGH had an antiluteolytic effect on uterine endometrium to affect lifespan of the corpus luteum; (3) only sequential exposure of the progesterone stimulated uterus to oIFNt and oPL or oGH increased endometrial gland proliferation and secretory protein gene expression; (4) oPL signals through a homodimer of ovine prolactin receptor (PRL-R) and heterodimer of oPRL-R and growth hormone receptor (GH-R); (5) exogenous recombinant oPL and oGH stimulated mammogenesis and milk yield during lactation; and (6) mutation of oPL and oGH was used to define specific biological effects and a rational basis for design of a specific receptor agonists or antagonists. This project was very productive in elucidating basic biological effects of oPL and oGH on intracellular signal transduction pathways, uterine development and secretory function, as well as mammogenesis and lactogenesis. We determined that immunization of prepubertal ewes against roPL increased birth weights of their lambs, especially those born as twins and triplets, as well as enhanced lactational performance. These studies significantly extended our knowledge of uterine and fetal-placental physiology and provided a foundation for new strategies to enhance reproductive and lactation efficiency. Based on these results, the major achievements were: 1) creation of a practical and cost effective management tool for producers to increase reproductive performance, neonatal survival, and milk yield of ewes in commercial flocks; and 2) define, for the first time, biological effects of oPL on endometrial functions and gene expression by uterine gland epithelium.
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Or, Etti, David Galbraith, and Anne Fennell. Exploring mechanisms involved in grape bud dormancy: Large-scale analysis of expression reprogramming following controlled dormancy induction and dormancy release. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7587232.bard.
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The timing of dormancy induction and release is very important to the economic production of table grape. Advances in manipulation of dormancy induction and dormancy release are dependent on the establishment of a comprehensive understanding of biological mechanisms involved in bud dormancy. To gain insight into these mechanisms we initiated the research that had two main objectives: A. Analyzing the expression profiles of large subsets of genes, following controlled dormancy induction and dormancy release, and assessing the role of known metabolic pathways, known regulatory genes and novel sequences involved in these processes B. Comparing expression profiles following the perception of various artificial as well as natural signals known to induce dormancy release, and searching for gene showing similar expression patterns, as candidates for further study of pathways having potential to play a central role in dormancy release. We first created targeted EST collections from V. vinifera and V. riparia mature buds. Clones were randomly selected from cDNA libraries prepared following controlled dormancy release and controlled dormancy induction and from respective controls. The entire collection (7920 vinifera and 1194 riparia clones) was sequenced and subjected to bioinformatics analysis, including clustering, annotations and GO classifications. PCR products from the entire collection were used for printing of cDNA microarrays. Bud tissue in general, and the dormant bud in particular, are under-represented within the grape EST database. Accordingly, 59% of the our vinifera EST collection, composed of 5516 unigenes, are not included within the current Vitis TIGR collection and about 22% of these transcripts bear no resemblance to any known plant transcript, corroborating the current need for our targeted EST collection and the bud specific cDNA array. Analysis of the V. riparia sequences yielded 814 unigenes, of which 140 are unique (keilin et al., manuscript, Appendix B). Results from computational expression profiling of the vinifera collection suggest that oxidative stress, calcium signaling, intracellular vesicle trafficking and anaerobic mode of carbohydrate metabolism play a role in the regulation and execution of grape-bud dormancy release. A comprehensive analysis confirmed the induction of transcription from several calcium–signaling related genes following HC treatment, and detected an inhibiting effect of calcium channel blocker and calcium chelator on HC-induced and chilling-induced bud break. It also detected the existence of HC-induced and calcium dependent protein phosphorylation activity. These data suggest, for the first time, that calcium signaling is involved in the mechanism of dormancy release (Pang et al., in preparation). We compared the effects of heat shock (HS) to those detected in buds following HC application and found that HS lead to earlier and higher bud break. We also demonstrated similar temporary reduction in catalase expression and temporary induction of ascorbate peroxidase, glutathione reductase, thioredoxin and glutathione S transferase expression following both treatments. These findings further support the assumption that temporary oxidative stress is part of the mechanism leading to bud break. The temporary induction of sucrose syntase, pyruvate decarboxylase and alcohol dehydrogenase indicate that temporary respiratory stress is developed and suggest that mitochondrial function may be of central importance for that mechanism. These finding, suggesting triggering of identical mechanisms by HS and HC, justified the comparison of expression profiles of HC and HS treated buds, as a tool for the identification of pathways with a central role in dormancy release (Halaly et al., in preparation). RNA samples from buds treated with HS, HC and water were hybridized with the cDNA arrays in an interconnected loop design. Differentially expressed genes from the were selected using R-language package from Bioconductor project called LIMMA and clones showing a significant change following both HS and HC treatments, compared to control, were selected for further analysis. A total of 1541 clones show significant induction, of which 37% have no hit or unknown function and the rest represent 661 genes with identified function. Similarly, out of 1452 clones showing significant reduction, only 53% of the clones have identified function and they represent 573 genes. The 661 induced genes are involved in 445 different molecular functions. About 90% of those functions were classified to 20 categories based on careful survey of the literature. Among other things, it appears that carbohydrate metabolism and mitochondrial function may be of central importance in the mechanism of dormancy release and studies in this direction are ongoing. Analysis of the reduced function is ongoing (Appendix A). A second set of hybridizations was carried out with RNA samples from buds exposed to short photoperiod, leading to induction of bud dormancy, and long photoperiod treatment, as control. Analysis indicated that 42 genes were significant difference between LD and SD and 11 of these were unique.
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Simelton, Elisabeth, Rachmat Mulia, Clement Rigal, et al. Beyond carbon sequestration – local knowledge about tree functions. Case study from male and female Arabica coffee farmers in Vietnam. World Agroforestry, 2021. http://dx.doi.org/10.5716/wp21025.pdf.
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Estimates of carbon sequestration for timber trees is well documented, while fruit trees are understudied. The few existing estimates indicate that fruit trees and fertiliser management on them, can substantially sequester carbon in coffee monocultures, albeit unlikely to the same extent as timber trees. A carbon investor may thus favour timber. In this light, as programs for planting billions and trillion trees are launched “to save the climate”, a wide range of gender, social, justice and environmental concerns are voiced. To challenge the mitigation perspective, we contrasted two hypothetical tree planting strategies: a mitigation (carbon finance) perspective and a livelihoods-centred (local) perspective and explored what a rapid, gender and social inclusion-oriented livelihoods perspective could bring to the process of tree selection. The survey documents indigenous knowledge of trees’ potential (dis)benefits in coffee agroforestry systems among 106 female and male arabica-growers in northwest Vietnam. The results display many similarities between women and men in term of perceived benefits from trees. Women and men prioritized trees based on their economic benefits, impacts on coffee production and improved soil fertility. However, in determining the preferred species, women considered more factors, including consequences for pest and disease (on host tree or coffee), microclimate regulation and shade provision. These findings resemble those by others from the same region and demonstrate that consulting both women and men can result in a more diverse shortlist of potential trees for agroforestry/afforestation that reflect both genders’ economic and labour contributions to the household. Furthermore, tree planting projects would benefit from seeking collaboration for bundled ecosystem services, rather than merely from carbon finance. Conversely, carbon investors can rely on farmers’ preferences and rest assured that they also contribute to sequestering carbon.
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Ostersetzer-Biran, Oren, and Jeffrey Mower. Novel strategies to induce male sterility and restore fertility in Brassicaceae crops. United States Department of Agriculture, 2016. http://dx.doi.org/10.32747/2016.7604267.bard.
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Abstract Mitochondria are the site of respiration and numerous other metabolic processes required for plant growth and development. Increased demands for metabolic energy are observed during different stages in the plants life cycle, but are particularly ample during germination and reproductive organ development. These activities are dependent upon the tight regulation of the expression and accumulation of various organellar proteins. Plant mitochondria contain their own genomes (mtDNA), which encode for rRNAs, tRNAs and some mitochondrial proteins. Although all mitochondria have probably evolved from a common alpha-proteobacterial ancestor, notable genomic reorganizations have occurred in the mtDNAs of different eukaryotic lineages. Plant mtDNAs are notably larger and more variable in size (ranging from 70~11,000 kbp in size) than the mrDNAs in higher animals (16~19 kbp). Another unique feature of plant mitochondria includes the presence of both circular and linear DNA fragments, which undergo intra- and intermolecular recombination. DNA-seq data indicate that such recombination events result with diverged mitochondrial genome configurations, even within a single plant species. One common plant phenotype that emerges as a consequence of altered mtDNA configuration is cytoplasmic male sterility CMS (i.e. reduced production of functional pollen). The maternally-inherited male sterility phenotype is highly valuable agriculturally. CMS forces the production of F1 hybrids, particularly in predominantly self-pollinating crops, resulting in enhanced crop growth and productivity through heterosis (i.e. hybrid vigor or outbreeding enhancement). CMS lines have been implemented in some cereal and vegetables, but most crops still lack a CMS system. This work focuses on the analysis of the molecular basis of CMS. We also aim to induce nuclear or organellar induced male-sterility in plants, and to develop a novel approach for fertility restoration. Our work focuses on Brassicaceae, a large family of flowering plants that includes Arabidopsis thaliana, a key model organism in plant sciences, as well as many crops of major economic importance (e.g., broccoli, cauliflower, cabbage, and various seeds for oil production). In spite of the genomic rearrangements in the mtDNAs of plants, the number of genes and the coding sequences are conserved among different mtDNAs in angiosperms (i.e. ~60 genes encoding different tRNAs, rRNAs, ribosomal proteins and subunits of the respiratory system). Yet, in addition to the known genes, plant mtDNAs also harbor numerous ORFs, most of which are not conserved among species and are currently of unknown function. Remarkably, and relevant to our study, CMS in plants is primarily associated with the expression of novel chimericORFs, which likely derive from recombination events within the mtDNAs. Whereas the CMS loci are localized to the mtDNAs, the factors that restore fertility (Rfs) are identified as nuclear-encoded RNA-binding proteins. Interestingly, nearly all of the Rf’s are identified as pentatricopeptide repeat (PPR) proteins, a large family of modular RNA-binding proteins that mediate several aspects of gene expression primarily in plant organelles. In this project we proposed to develop a system to test the ability of mtORFs in plants, which are closely related to known CMS factors. We will induce male fertility in various species of Brassicaceae, and test whether a down-relation in the expression of the recombinantCMS-genes restores fertility, using synthetically designed PPR proteins.
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Pessino, Carola, Nadir Altinok, and Cristian Chagalj. Allocative Efficiency of Government Spending for Growth in Latin American Countries. Inter-American Development Bank, 2022. http://dx.doi.org/10.18235/0004310.
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There is scant empirical economic research regarding the way that Latin American governments efficiently allocate their spending across different functions to achieve higher growth. While most papers restrict their analysis to the size of government, much less is known about the composition of spending and its implications for long-term growth. This paper sheds light on how allocating expenditures to investment in quality human and physical capital, and avoiding waste on inefficient expenditures, enhance growth in Latin America. This paper uses a novel dataset on physical and human capital and detailed public spending that includes -for the first time- Latin American countries, which is categorized by a cross-classification that provides the breakdown of government expenditure, both, by economic and by functional heads. The database covers 42 countries of the OECD and LAC between 1985 and 2017. There are five main results. First, the estimated growth equations show significant positive effects of the factors of production on growth and plausible convergence rates (about 2 percent). The estimated effect of the physical investment rate is positive and significant with a long-run elasticity of 1.2. Second, while the addition of years of education as a proxy for human capital tends to have no effect on growth, the addition of a new variable that measures quality-adjusted years of schooling as a proxy for human capital turns out to have a positive and significant effect across all specifications with a long-run elasticity of 1.1. However, if public spending on education (excluding infrastructure spending) is added to the factor specification, growth is not affected. This is mainly because, once quality is considered, spending more on teacher salaries has no effect on student outcomes. Therefore, the key is to increase quality, not just school performance or education spending. Third, both physical and human capital are equally important for growth: the effect of increasing one standard deviation of physical capital or human capital statistically has the same impact on economic growth. Fourth, increasing public investment spending (holding public spending constant) is positive and significant for growth (a 1% increase in public investment would increase the long-term GDP per capita by about 0.3 percent), in addition to the effect of the private investment rate. However, the effect of public spending on payroll, pensions and subsidies does not contribute to economic growth. Fifth, the overall effect of the size of public spending on economic growth is negative in most specifications. An increase in the size of government by about 1 percentage point would decrease 4.1 percent the long-run GDP per capita, but the more effective the government is, the less harmful the size of government is for long-term growth.
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Nechaev, V., Володимир Миколайович Соловйов, and A. Nagibas. Complex economic systems structural organization modelling. Politecnico di Torino, 2006. http://dx.doi.org/10.31812/0564/1118.
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One of the well-known results of the theory of management is the fact, that multi-stage hierarchical organization of management is unstable. Hence, the ideas expressed in a number of works by Don Tapscott on advantages of network organization of businesses over vertically integrated ones is clear. While studying the basic tendencies of business organization in the conditions of globalization, computerization and internetization of the society and the results of the financial activities of the well-known companies, the authors arrive at the conclusion, that such companies, as IBM, Boeing, Mercedes-Benz and some others companies have not been engaged in their traditional business for a long time. Their partner networks performs this function instead of them. The companies themselves perform the function of system integrators. The Tapscott’s idea finds its confirmation within the framework of a new powerful direction of the development of the modern interdisciplinary science – the theory of the complex networks (CN) [2]. CN-s are multifractal objects, the loss of multifractality being the indicator of the system transition from more complex state into more simple state. We tested the multifractal properties of the data using the wavelet transform modulus maxima approach in order to analyze scaling properties of our company. Comparative analysis of the singularity spectrumf(®), namely, the difference between maximum and minimum values of ® (∆ = ®max ¡ ®min) shows that IBM company is considerably more fractal in comparison with Apple Computer. Really, for it the value of ∆ is equal to 0.3, while for the vertically integrated company Apple it only makes 0.06 – 5 times less. The comparison of other companies shows that this dependence is of general character. Taking into consideration the fact that network organization of business has become dominant in the last 5-10 years, we carried out research for the selected companies in the earliest possible period of time which was determined by the availability of data in the Internet, or by historically later beginning of stock trade of computer companies. A singularity spectrum of the first group of companies turned out to be considerably narrower, or shifted toward the smaller values of ® in the pre-network period. The latter means that dynamic series were antipersistant. That is, these companies‘ management was rigidly controlled while the impact of market mechanisms was minimized. In the second group of companies if even the situation did changed it did not change for the better. In addition, we discuss applications to the construction of portfolios of stock that have a stable ratio of risk to return.
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Perl-Treves, Rafael, Rebecca Grumet, Nurit Katzir, and Jack E. Staub. Ethylene Mediated Regulation of Sex Expression in Cucumis. United States Department of Agriculture, 2005. http://dx.doi.org/10.32747/2005.7586536.bard.
Full textAbstract:
Monoecious species such as melon and cucumber develop separate male and female (or bisexual) flowers on the same plant individual. They display complex genetic and hormonal regulation of sex patterns along the plant. Ethylene is known to play an important role in promoting femaleness and inhibiting male development, but many questions regarding critical sites of ethylene production versus perception, the relationship between ethylene and the sex determining loci, and the possible differences between melon and cucumber in this respect are still open. The general goal of the project was to elucidate the role of ethylene in determining flower sex in Cucumis species, melon and cucumber. The specific Objectives were: 1. Clone and characterize expression patterns of cucumber genes involved in ethylene biosynthesis and perception. 2. Genetic mapping of cloned genes and markers with respect to sex loci in melon and cucumber. 3. Produce and analyze transgenic melons altered in ethylene production or perception. In the course of the project, some modifications/adjustments were made: under Objective 2 (genetic mapping) a set of new mapping populations had to be developed, to allow better detection of polymorphism. Under Objective 3, cucumber transformation systems became available to us and we included this second model species in our plan. The main findings of our study support the pivotal role of ethylene in cucumber and melon sex determination and later stages of reproductive development. Modifying ethylene production resulted in profound alteration of sex patterns in melon: femaleness increased, and also flower maturation and fruit set were enhanced, resulting in earlier, more concentrated fruit yield in the field. Such effect was previously unknown and could have agronomic value. Our results also demonstrate the great importance of ethylene sensitivity in sex expression. Ethylene perception genes are expressed in sex-related patterns, e.g., gynoecious lines express higher levels of receptor-transcripts, and copper treatments that activate the receptor can increase femaleness. Transgenic cucumbers with increased expression of an ethylene receptor showed enhanced femaleness. Melons that expressed a defective receptor produced fewer hermaphrodite flowers and were insensitive to exogenous ethylene. When the expression of defective receptor was restricted to specific floral whorls, we saw that pistils were not inhibited by the blocked perception at the fourth whorl. Such unexpected findings suggest an indirect effect of ethylene on the affected whorl; it also points at interesting differences between melon and cucumber regarding the mode of action of ethylene. Such effects will require further study. Finally, our project also generated and tested a set of novel genetic tools for finer identification of sex determining genes in the two species and for efficient breeding for these characters. Populations that will allow easier linkage analysis of candidate genes with each sex locus were developed. Moreover, effects of modifier genes on the major femaleness trait were resolved. QTL analysis of femaleness and related developmental traits was conducted, and a comprehensive set of Near Isogenic Lines that differ in specific QTLs were prepared and made available for the private and public research. Marker assisted selection (MAS) of femaleness and fruit yield components was directly compared with phenotypic selection in field trials, and the relative efficiency of MAS was demonstrated. Such level of genetic resolution and such advanced tools were not used before to study these traits, that act as primary yield components to determine economic yields of cucurbits. In addition, this project resulted in the establishment of workable transformation procedures in our laboratories and these can be further utilized to study the function of sex-related genes in detail.
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Sadowski, Dieter. Board-Level Codetermination in Germany - The Importance and Economic Impact of Fiduciary Duties. Association Inter-University Centre Dubrovnik, 2021. http://dx.doi.org/10.53099/ntkd4304.
Full textAbstract:
The empirical accounts of the costs and benefits of quasi-parity codetermined supervisory boards, a very special German institution, have long been inconclusive. A valid economic analysis of a particular legal regulation must take the legal specificities seriously, otherwise it will be easily lost in economic fictions of functional equivalence. At its core the corporate actor “supervisory board” has no a priori objective function to be maximised – the corner stone of the theory of the firm – but its objective function will only be brought about a posteriori – should negotiations result in an agreement (E. Fraenkel). With this understanding,the paper presents six recent quasi-experimental studies on the economic (dis) advantageousness of the German codetermination laws that try to follow the rules of causal inference despite the lack of random variation. By and large they refute the hold-up model of codetermination by showing positive or nonnegative effects even on shareholder wealth – and a far-reaching improvement of the well-being of the core workforce. In conclusion, indications are offered that the shareholder primacy movement has only weakened, but not dissolved the “Deutschland AG”.
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Elizur, Abigail, Amir Sagi, Gideon Hulata, Clive Jones, and Wayne Knibb. Improving Crustacean Aquaculture Production Efficiencies through Development of Monosex Populations Using Endocrine and Molecular Manipulations. United States Department of Agriculture, 2010. http://dx.doi.org/10.32747/2010.7613890.bard.
Full textAbstract:
Background Most of Australian prawn aquaculture production is based on P. monodon. However, the Australian industry is under intense competition from lower priced overseas imports. The availability of all-female monosex populations, by virtue of their large size and associated premium prize, will offer competitive advantage to the industry which desperately needs to counteract competitors within this market. As for the redclaw production in Israel, although it is at its infancy, the growers realized that the production of males is extremely advantageous and that such management strategy will change the economic assumptions and performances of this aquaculture to attract many more growers. Original objectives (as in original proposal) Investigating the sex inheritance mechanism in the tiger prawn. Identification of genes expressed uniquely in the androgenic gland (AG) of prawns and crayfish. The above genes and/or their products will be used to localize the AG in the prawn and manipulate the AG activity in both species. Production of monosex populations through AG manipulation. In the prawn, production of all-female populations and in the crayfish, all-male populations. Achievements In the crayfish, the AG cDNA library was further screened and a third AG specific transcript, designated Cq-AG3, had been identified. Simultaneously the two AG specific genes, which were previously identified, were further characterized. Tissue specificity of one of those genes, termed Cq-AG2, was demonstrated by northern blot hybridization and RNA in-situ hybridization. Bioinformatics prediction, which suggested a 42 amino acid long signal anchor at the N-terminus of the deduced Cq-AG2, was confirmed by immunolocalization of a recombinant protein. Cq-IAG's functionality was demonstrated by dsRNA in-vivo injections to intersex crayfish. Cq-IAGsilencing induced dramatic sex-related alterations, including male feature feminization, reduced sperm production, extensive testicular apoptosis, induction of the vitellogeningene expression and accumulation of yolk proteins in the ovaries. In the prawn, the AG was identified and a cDNA library was created. The putative P. monodonAG hormone encoding gene (Pm-IAG) was identified, isolated and characterized for time of expression and histological localization. Implantation of the AG into prawn post larvae (PL) and juveniles resulted in phenotypic transformation which included the appearance of appendix masculina and enlarged petasma. The transformation however did not result in sex change or the creation of neo males thus the population genetics stage to be executed with Prof. Hulata did not materialized. Repeated AG implantation is currently being trialed. Major conclusions and Implications, both scientific and agricultural Cq-IAG's involvement in male sexual differentiation had been demonstrated and it is strongly suggested that this gene encodes an AG hormone in this crayfish. A thorough screening of the AG cDNA library shows Cq-IAG is the prominent transcript within the library. However, the identification of two additional transcripts hints that Cq-IAG is not the only gene mediating the AG effects. The successful gene silencing of Cq-IAG, if performed at earlier developmental stages, might accomplish full and functional sex reversal which will enable the production of all-male crayfish populations. Pm-IAG is likely to play a similar role in prawns. It is possible that repeated administration of the AG into prawn will lead to the desired full sex reversal, so that WZ neo males, crossed with WZ females can result in WW females, which will form the basis for monosex all-female population.