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Trotter, Vinessa Kaye. "The Relationship Between Psychological Well-Being and Work Productivity: Validation of the OQ Productivity Index." BYU ScholarsArchive, 2008. https://scholarsarchive.byu.edu/etd/1867.
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Managed Mental Health Care (MMHC) began blanketing the United States when cost of care rose exponentially. MMHC is one avenue many employers and insurance companies have chosen to provide employees with mental health treatment at controlled costs. However, not all employers view supplying their employees with mental health treatment beneficial, as they do not know mental health problems can significantly decrease work productivity. Brown and Jones (2005) used the Social Role Scale (SR) of the Severe Outcome Questionnaire (SOQ) to estimate work productivity in employees under the assumption that the scale measures work productivity. The purpose of this study was to move closer to an estimation of the relationship between improved mental health and improved workplace functioning by examining the relationships among a self-report measure of mental health (i.e., the SR), a self-report measure of work productivity (i.e., the Work Productivity and Activity Impairment Scale [WPAI]), and objective measures of work productivity (i.e., the quality and timeliness of institutional records, supervisor ratings, and sick hours used). It was thought that understanding the relationships among these measures might assist in estimating the cost/benefit of investing in psychotherapy. Participants in this study were employees and inpatients at the Utah State Hospital. Statistical analyses indicated the SR did predict two WPAI scales (i.e., Presenteeism and Activity Impairment) for employees. Specific relationships among measures, and suggestions for future research, are discussed.
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Nunsavathu, Upender Naik. "Productivity index of multilateral wells." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4702.
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Thesis (M.S.)--West Virginia University, 2006.Title from document title page. Document formatted into pages; contains xi, 106 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 104-106).
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Khalmanova, Dinara Khabilovna. "A mathematical model of the productivity index of a well." Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/301.
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Motivated by the reservoir engineering concept of the productivity index of a producing oil well in an isolated reservoir, we analyze a time dependent functional, diffusive capacity, on the solutions to initial boundary value problems for a parabolic equation. Sufficient conditions providing for time independent diffusive capacity are given for different boundary conditions. The dependence of the constant diffusive capacity on the type of the boundary condition (Dirichlet, Neumann or third-type boundary condition) is investigated using a known variational principle and confirmed numerically for various geometrical settings. An important comparison between two principal constant values of a diffusive capacity is made, leading to the establishment of criteria when the so-called pseudo-steady-state and boundary-dominated productivity indices of a well significantly differ from each other. The third type boundary condition is shown to model the thin skin effect for the constant wellbore pressure production regime for a damaged well. The questions of stabilization and uniqueness of the time independent values of the diffusive capacity are addressed. The derived formulas are used in numerical study of evaluating the productivity index of a well in a general three-dimensional reservoir for a variety of well configurations.
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Larochelle, Catherine. "Three essays on productivity and risk, marketing decisions, and changes in well-being over time." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/40379.
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This dissertation is composed of three essays; the first two examine the decisionmaking of potato producing households in Bolivia and the third examines well-being changes among Zimbabwe households. The first essay entitled “The role of risk mitigation in production efficiency: A case study of potato cultivation in the Bolivian Andes” estimates the costs of self-managing environmental risk through activity and environmental diversification. Risk management has the potential to reduce income variability but at the cost of increasing production inefficiency, which we measure employing a stochastic production frontier. Among variables capturing environmental diversification, discontinuity between fields has the most detrimental effect on production efficiency. Activity diversification, measured by the ratio of potato to total crop revenue, has a stronger impact on inefficiency and yield losses than any of the environmental diversification variables.
The second essay entitled “Determinants of market participation decisions and marketing choices in Bolivia” examines three decisions related to potato market participation: market entry, volume sold, and market choice. The first two are analyzed using a Heckman selection model. Results indicate that isolation, measured by population density and distance to markets, negatively impacts market entry. The most important determinant of quantity sold is land holding. Market choices are judged according to second-order stochastic dominance (SOSD). Market choices meeting the SOSD criterion are referred to as optimal marketing strategies as they have the higher expected payoff for a minimal income variance. Results suggest that the probability of selecting an optimal marketing strategy increases with quantity sold, access to market information, and access to liquidity while it decreases with distance to markets.
The third essay entitled “A profile of changes in well-being in Zimbabwe, 2001- 2007/8, using an asset index methodology” shows that it is possible to examine intertemporal and spatial changes in well-being in the absence of consumption expenditures data by using an asset index. The asset index was constructed using Polychoric Principal Component Analysis. Results indicate that poverty and extremely poverty grew significantly in rural Zimbabwe while in urban areas, poverty diminished and extreme poverty grew.Ph. D.
LTRA-7 (Pathways to CAPS in the Andes)
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Carrillo, Arturo Naisa Veronica. "Integração de dados para analise de desempenho de poços de petroleo." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263349.
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Orientadores: Jose Ricardo Pelaquim Mendes, Celso Kazuyuki MorookaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica, Instituto de Geociencias
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Resumo: Neste trabalho é proposto um parâmetro, denominado de índice de desempenho do sistema, que permite estudar o desempenho de poços de petróleo. Um diferencial deste parâmetro é que ele utiliza dados reais e abundantes de campo que são medidos periodicamente. Tal índice permite, por exemplo, avaliar o desempenho e as tecnologias utilizadas nos poços. Usando este índice, verificou-se a influência da geometria do poço para um mesmo campo e uma mesma zona produtora, comparando o desempenho dos poços verticais, direcionais e horizontais. Comparou-se também o desempenho do tipo de contenção de areia para esse mesmo campo e essa mesma zona produtora. Os dados utilizados neste trabalho foram gentilmente fornecidos pela Petrobras.
Abstract: In this work a new parameter called the System Performance Index is proposed, which allows a more profound study of the performance of petroleum wells. An outstanding characteristic of this parameter is that it uses a large amount of field data measured periodically. This index allows the assessing of the performance and technologies used in the wells. This study presents a comparison of the performance of vertical, directional and horizontal wells. The sand control technologies used in the wells are also evaluated. Finally, the proposed parameter enables a practical analysis that can be implemented as a strategic tool for oilfield, performance and optimization studies. Data used in this work were kindly supplied by Petrobras.
Mestrado
Explotação
Mestre em Ciências e Engenharia de Petróleo
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Ariza, Sergio Fernando Celis. "Estudos de aplicação de um novo parâmetro para análise de desempenho de sistemas de produção de petróleo." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263245.
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Orientadores: José Ricardo Pelaquim Mendes, Sérgio Nascimento BordaloDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica e Instituto de Geociências
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Resumo: O avanço tecnológico na instrumentação de poços de petróleo tem proporcionado um vasto volume de dados. A análise desses dados pode fornecer uma importante contribuição aos projetos de futuras instalações de produção. Para esta finalidade é necessário organizar e integrar informações que se encontram em diferentes setores, referentes ao poço, ao reservatório e às linhas de escoamento. Este processo de interpretação de dados requer o desenvolvimento de ferramentas e de métodos de análise. O Índice de Desempenho do Escoamento (IDE) é um parâmetro operacional que serve de instrumentação para estudar o desempenho das instalações de poços de petróleo utilizando os dados abundantes de campo que são medidos periodicamente em tempo real. O IDE permite, por exemplo, avaliar o desempenho das tecnologias empregadas nos poços. Neste trabalho, estuda-se o potencial de aplicação do IDE para poços que operam com gas-lift. O IDE é utilizado para verificar a influência da geometria do poço, comparar o desempenho de poços horizontais, verticais e direcionais em um mesmo campo e zona produtora, para comparar o tipo de contenção de areia, para identificar a presença de problemas no sistema de produção e no auxilio ao diagnóstico de tais problemas
Abstract: Technological advances in oil wells instrumentation have provided a volume of important data. The Analysis of these data can provide an important contribution to the projects of future production facilities. For this purpose is necessary to organize and to integrate information that are in different sectors, referring to the well, reservoir and flow lines. This process of data interpretation requires the development of tools and methods of analysis. The Flow Performance Index (FPI) is an operational parameter that can used to study the performance of oil wells facilities using the field abundant data which are measured periodically in real time. For example, the FPI allows assessment the technologies performance employed in the wells. In the present study, examines the FPI application potential for wells that operate with gas-lift. The IDE is used to verify the influence of well geometry to compare the performance of horizontal, vertical and directional wells for the same field and same producing area. The FPI is employed to compare the performance of the type of sand control technologic. The FPI is applied in identification of problems presence in the production system and in the aid to diagnosis these problems
Mestrado
Explotação
Mestre em Ciências e Engenharia de Petróleo
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Adesokan, Muhideen Bolaji. "Overcoming unboundedness in Malmquist productivity measures : emprical tests of the mamquist total factor productivity index." Thesis, University of Leicester, 2007. http://hdl.handle.net/2381/31122.
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The widely applied non-parametric Malmquist Productivity Index (MPI) is beset by Unboundedness under variable returns to scale technology assumptions. Potentially, this leads to inaccurate productivity measurements. The Malmquist Total Factor Productivity Index (MTFP) has been proposed as an alternative index for overcoming Unboundedness and has seen applications at the firm level. I extend the body of knowledge on these two indexes by applying them both to aggregate level data to examine the extent to which they are beset by Unboundedness and furthermore by decomposing the MTFP. Furthermore I address the pervasive gap in the literature on the relative performance of global regions. This level of study has received little attention while much work has been done on the relative performance of individual nations. I find that the MTFP completely overcomes Unboundedness whereas the 5% of distance functions computed with the MPI are subject to the problem. In addition there is a statistically significant difference between the variable returns to scale (VRS) MTFP and MPI. There is a similarly significant difference between the variable returns to scale MTFP and the constant returns to scale MPI that has been widely used as its proxy. Thus I conclude advocating the use of the MTFP where the production relation being examined is best characterised by variable returns to scale technology assumptions. The Far East region was found to have achieved best performance in the 1980 -- 1999 period. There is an indication, albeit tenuous, that the regions with organised economic blocs achieve relatively high levels of performance.
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Chen, Guanlu. "Calculation of well productivity by analytical and numerical simulators." Thesis, Heriot-Watt University, 1995. http://hdl.handle.net/10399/1313.
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Lu, Jing. "A Mathematical Model of Horizontal Wells Productivity and Well Testing Analysis." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/37018.
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This thesis presents new productivity and well testing formulae of
horizontal wells. Taking a horizontal well as a uniform line source,
this thesis finds velocity potential formula and the productivity
formulae for a horizontal well in an ellipsoid of revolution drainage
volume by solving analytically the involved three-dimensional
partial differential equations. These formulae can account for the
advantages of horizontal wells, and they are more accurate than other
formulae which are based on two-dimensional hypotheses. This thesis also
presents new well testing formulae of horizontal wells in a single porosity
system and a double porosity system. Compared with the formulae published in
the literatures, our formulae, which do not use the sum of infinite
series, are more reasonable and easy to be used in well testing analysis.Master of Science
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Vågenes, Karianne Skårnes. "Completion Design Review with Focus on Well Integrity and Productivity." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19409.
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In this thesis a full well design and detailed tubing design has been developed for the HPHT well K-14. Wellcat™ casing design software has been used for tubing string analysis. K-14 has been designed using the same conditions as for wells in the Morvin HPHT field. The main issues related to this specific well design are the completion of the reservoir section, the tubing design with all relevant loads, and a HPHT well design with flexibility for intervention and stimulation by hydraulic fracturing. The reservoir drainage plan is based on wells with horizontal reservoir sections for optimal and cost effective recovery. The tubing has been designed and engineered for all the loads that the well may be exposed to during its lifetime. It is very important that all possible loads have been investigated, so the well complies with the HPHT requirements. The loads seen by the well can be divided in two groups: the loads induced by production and the loads during installation (qualification/pressure testing) and intervention.The focus of the well design has been to achieve optimal drainage with a simple and flexible solution to meet the requirements for intervention. Extreme loads may occur for wells in HPHT fields. There are additional aspects to consider when engineering these wells, such as steel and material degradation when exposed to high temperatures, and large temperature variations from production to bullheading with cold fluids. The effect of extreme temperature changes are seen by the liquids in the closed annuli, they will expand/contract resulting in an increase/decrease in pressure seen by the tubulars. The temperature variations will also affect sealing elastomers that are under high pressures, making them brittle and reduce/loose the sealing capacity. The aspects of well design and tubing design are discussed in detail through the development and engineering of the HPHT well K-14
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Mattsson, Pontus. "Essays on total factor productivity (TFP)." Licentiate thesis, Linnéuniversitetet, Institutionen för nationalekonomi och statistik (NS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-68471.
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This thesis consists of two self-contained empirical essays. Essay I investigates the impact of labor subsidies on TFP, and profit per employee is included as a second outcome. Coarsened exact matching (CEM) is performed on the key variables. After matching, a difference-in-difference (DID) model is applied. The study shows that firms employing workers with wage subsidies experience negative and significant effects on both TFP and profit per employee. Heterogeneity is, however, observed; the only sector to show a deficit in both TFP and profit per employee is wholesale. During the second year with a subsidy, a negative impact can be observed on the profit per employee but not on TFP. The policy conclusion from the analysis is that subsidizing individuals from particular groups is necessary to induce firms to hire workers from these groups. However, the time period for which a single firm is subsidized should be considered. Essay II (with Jonas Månsson from Linnaeus University and the Swedish National Audit Office (SNAO), Christian Andersson from SNAO and Fredrik Bonander from SNAO) measures TFP of the Swedish district courts by applying data envelopment analysis (DEA) to calculate the Malmquist productivity index for 48 Swedish district courts from 2012 to 2015. This study uses a fully decomposed Malmquist index. A bootstrapping approach is further applied to compute confidence intervals for each decomposed factor of TFP as well as for TFP. The study shows an average annual of TFP by 0.7%. However, a substantial variation between years is observed both with regards to the number of statistically significant courts below and above unity. The negative impact is mainly driven by pure technical regress. Large variations are also observed over time where the small courts have the largest volatility. The TFP change is positively correlated with the rate of change in the caseload. Two recommendations are: 1) that district courts with negative TFP growth could learn from those with positive TFP growth and 2) that a back-up force could be developed to enhance flexibility.
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Cheng, Yueming. "Pressure transient testing and productivity analysis for horizontal wells." Texas A&M University, 2003. http://hdl.handle.net/1969.1/1187.
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This work studied the productivity evaluation and well test analysis of horizontal wells. The major components of this work consist of a 3D coupled reservoir/wellbore model, a productivity evaluation, a deconvolution technique, and a nonlinear regression technique improving horizontal well test interpretation.
A 3D coupled reservoir/wellbore model was developed using the boundary element method for realistic description of the performance behavior of horizontal wells. The model is able to flexibly handle multiple types of inner and outer boundary conditions, and can accurately simulate transient tests and long-term production of horizontal wells. Thus, it can serve as a powerful tool in productivity evaluation and analysis of well tests for horizontal wells.
Uncertainty of productivity prediction was preliminarily explored. It was demonstrated that the productivity estimates can be distributed in a broad range because of the uncertainties of reservoir/well parameters.
A new deconvolution method based on a fast-Fourier-transform algorithm is presented. This new technique can denoise "noisy" pressure and rate data, and can deconvolve pressure drawdown and buildup test data distorted by wellbore storage. For cases with no rate measurements, a "blind" deconvolution method was developed to restore the pressure response free of wellbore storage distortion, and to detect the afterflow/unloading rate function using Fourier analysis of the observed pressure data. This new deconvolution method can unveil the early time behavior of a reservoir system masked by variable-wellbore-storage distortion, and thus provides a powerful tool to improve pressure transient test interpretation. The applicability of the method is demonstrated with a variety of synthetic and actual field cases for both oil and gas wells.
A practical nonlinear regression technique for analysis of horizontal well testing is presented. This technique can provide accurate and reliable estimation of well-reservoir parameters if the downhole flow rate data are available. In the situation without flow rate measurement, reasonably reliable parameter estimation can be achieved by using the detected flow rate from blind deconvolution. It has the advantages of eliminating the need for estimation of the wellbore storage coefficient and providing reasonable estimates of effective wellbore length. This technique provides a practical tool for enhancement of horizontal well test interpretation, and its practical significance is illustrated by synthetic and actual field cases.
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Pokharel, Krishna Prasad. "Measuring the efficiency and productivity of agricultural cooperatives." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32944.
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Doctor of PhilosophyDepartment of Agricultural Economics
Allen M. Featherstone
This dissertation focuses on measuring the efficiency and productivity for agricultural cooperatives in the United States using the data envelopment analysis (DEA) approach. Economic measures such as cost efficiency, economies of scale, and economies of scope are measured by estimating a cost frontier in a multiproduct framework. Productivity growth is measured using the biennial Malmquist index approach. The cost frontier is the basis for calculating cost efficiency, economies of scale, and economies of scope as the cost frontier estimation in a multiproduct approach describes how cost changes as output changes. The estimates of economies of scale and scope have important implications for agricultural cooperatives because most of the cooperatives sell more than one product. Understanding the impact of changing output levels or mixes on the cost structure is helpful to improve the performance of cooperatives. Further, scope economies estimate the percentage of cost savings through product diversification in a multiproduct firm. The trade-off between cost efficiency and multiproduct scale economies allows the estimation of whether a higher percentage of cost can be eliminated by becoming cost efficient or changing the scale of operations. The economic measures are estimated using a single cost frontier (multi-year frontier) and annual cost frontiers. Multiproduct economies of scale and economies of scope exist indicating that increasing scale and product diversification can reduce cost for agricultural cooperatives. The mean values of product-specific economies of scale for all outputs are close to one indicating that cooperatives are operating close to constant returns to scale. The comparison between cost efficiency and scale economies suggests that smaller cooperatives can save a higher percentage of cost by increasing the scale of operations rather than just becoming cost efficient. Because larger incentives exist for small cooperatives to increase scale, mergers will likely continue until economies of scale are exhausted in the industry. Annual estimates show that agricultural cooperatives have become less cost efficient over time, but economies of scale and economies of scope remain consistent across years. Many agricultural cooperatives face economies of scale indicating that variable returns to scale as opposed to constant returns to scale is the appropriate technology for modeling agricultural farm marketing and supply cooperatives. Further, the Kolmogorov-Smirnov (KS) test and two sample t-test are used to examine whether economic measures estimated from a single frontier and annual frontiers are statistically different. The KS test and t-test indicate that economic measures obtained from the single frontier are statistically different from those measures calculated from annual frontiers. This indicates that the cost frontier has shifted over time. Productivity growth of agricultural cooperatives is estimated using the biennial Malmquist productivity index (BMI) under variable returns to scale over the period 2005 to 2014. The BMI avoids numerical infeasibilities under variable returns to scale compared to traditional methods. The BMI is decomposed into efficiency change and technical change to evaluate the sources of productivity growth. Overall, agricultural cooperatives gained 34% cumulative productivity growth during the decade allocated by -2% and 37% cumulative technical efficiency change and technical change over the study period. Technical change was the major source of productivity growth rather than efficiency change. Cooperatives can achieve higher productivity by increasing managerial efficiency and by investing in technology.
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Fethi, Meryem Duygun. "Efficiency and productivity growth in the European airlines industry : applications of data envelopment analysis, Malmquist productivity index and Tobit analysis." Thesis, University of Leicester, 2000. http://hdl.handle.net/2381/31108.
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In its early phase of liberalisation process along with some privatisation experiences, the European airlines industry provides a fascinating case study to investigate the recent performance record and assess the determinants of performance. We aim to analyse the performance of 17 European airlines over the period 1991 to 1995. We utilise the DEA Windows analysis to capture efficiency changes over time and the DEA based Malmquist productivity index to measure the productivity change and decompose any change into efficiency and frontier shift effects. Further we use Tobit analysis to determine the potential determinants of airline efficiency. We find that results from windows analysis reveal an increasing trend in the efficiency scores for most airlines in the sample whereas Malmquist analysis shows a decline in the first two periods, but some evidence of turnaround in 1993-1994, probably with the introduction of the third liberalisation package. The Tobit results show no significant role for state ownership, but indicate the importance of subsidy and concentration policies in explaining the inefficiency differences among airlines.
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Edquist, Harald. "Technological breakthroughs and productivity growth." Doctoral thesis, Stockholm : Economic Research Institute, Stockholm School of Economics (EFI), 2006. http://www2.hhs.se/EFI/summary/696.htm.
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Knight, Craig. "The psychology of space : determinants of social identity, well-being and productivity." Thesis, University of Exeter, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507440.
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Smit, Eldry. "Flourishing at work : exploring the link between subjective well-being and productivity." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97359.
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Thesis (MBA)--Stellenbosch University, 2015.ENGLISH ABSTRACT: Flourishing employees are happier, more creative, better at problem solving, take less sick days and stay at companies for longer. Considering all the successful business outcomes if employees are flourishing, management should actively measure and promote subjective well-being. This research explored the concept of happiness and the features of subjective well-being. It further measured the levels of subjective well-being and compared this with staff turnover and sick leave at a law firm in Johannesburg. The research found a strong link between high levels of well-being, considered as flourishing, and productivity. The results also revealed a strong inverse relationship between flourishing and loneliness, validating the adage that we are social creatures. Lastly, the research found that healthy employees consider themselves happier than unhealthy employees do.
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Gao, Christine. "The Wage Gap and its Effects on Well-Being, Motivation, and Productivity." Scholarship @ Claremont, 2017. http://scholarship.claremont.edu/scripps_theses/934.
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As of 2016, women in the U.S. are still making 80 cents on the dollar relative to men, and even with controls for other factors such as education, experience, and hours worked, the pay disparity is still around eight percent. The equity, efficiency wage, and Cognitive Evaluation Theories, suggest that a closed gender wage gap would be more beneficial to society. This paper uses these theories to investigate the relationship between productivity and pay disparity by using an ordinary least squares regression model to test the effects of the gender wage ratio on labor productivity while controlling for some human capital characteristics. Additionally, this paper furthers the hypotheses that the wage gap is detrimental to labor productivity and worker well-being by proposing a study in which a simulated wage gap is predicted to negatively affect worker satisfaction, motivation, and productivity. Findings and implications for further research are discussed.
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Severgnini, Battista. "Essays in Total Factor Productivity measurement." Doctoral thesis, Humboldt-Universität zu Berlin, Wirtschaftswissenschaftliche Fakultät, 2010. http://dx.doi.org/10.18452/16195.
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Diese Dissertation umfasst sowohl einen theoretisches als auch einen empirischen Beitrag zur Analyse der Messung der gesamten Faktorproduktivität (TFP). Das erste Kapitel inspiziert die bestehende Literatur über die häufigsten Techniken der TFP Messung und gibt einen Überblick über deren Limitierung. Das zweite Kapitel betrachtet Daten, die durch ein Real Business Cycle Modell generiert wurden und untersucht das quantifizierbare Ausmaß von Messfehlern des Solow Residuums als ein Maß für TFP Wachstum, wenn der Kapitalstock fehlerhaft gemessen wird und wenn Kapazitätsauslastung und Abschreibungen endogen sind. Das dritte Kapitel schlägt eine neue Methodologie in einem bayesianischen Zusammenhang vor, die auf Zustands- Raum-Modellen basiert. Das vierte Kapitel führt einen neuen Ansatz zur Bestimmung möglicher Spill-over Effekte auf Grund neuer Technologien auf die Produktivität ein und kombiniert eine kontrafaktische Zerlegung, die von den Hauptannahmen des Malquist Indexes abgeleitet wird mit ökonometrischen Methoden, die auf Machado and Mata (2005) zurückgehen.This dissertation consists of theoretical and empirical contributions to the study on Total Factor Productivity (TFP) measurement. The first chapter surveys the literature on the most used techniques in measuring TFP and surveys the limits of these frameworks. The second chapter considers data generated from a Real Business Cycle model and studies the quantitative extent of measurement error for the Solow residual as a measure of TFP growth when the capital stock is measured with error and when capacity utilization and depreciation are endogenous. Furthermore, it proposes two alternative measurements of TFP growth which do not require capital stocks. The third chapter proposes a new methodology based on State-space models in a Bayesian framework. Applying the Kalman Filter to artificial data, it proposes a computation of the initial condition for productivity growth based on the properties of the Malmquist index. The fourth chapter introduces a new approach for identifying possible spillovers emanating from new technologies on productivity combining a counterfactual decomposition derived from the main properties of the Malmquist index and the econometric technique introduced by Machado and Mata (2005).
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Peterson, Glenn Allen. "Evaluation of sow productivity index selection in Landrace and Duroc swine /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu148759070298978.
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Bhattacharya, Arka. "Impact of Continuous Integration on Software Quality and Productivity." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1410945557.
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Galarza, Francisco B., and J. Guillermo Díaz. "Total Factor Productivity in the Peruvian Agriculture: Estimation and Determinants." Economía, 2015. http://repositorio.pucp.edu.pe/index/handle/123456789/116883.
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In this article, we propose an estimation of the agriculture productivity using micro data forPeru. The method used builds on recent production function’s estimation techniques developed for panel data (e.g., Gandhi et al., 2013) but using cross-section data. Data constraints urge us to impose functional forms for the estimation. In particular, we choose the constant elasticity of substitution function, which is more flexible that other functions used by prior literature in Peru (such as the Cobb-Douglas). We find no evidence of the existence of increasing returns to scale in the Peruvian agriculture, and that the productivity is positively correlated with age, sex, andeducation, and negatively correlated with the farming unit’s acreage and market power.En este artículo, proponemos la estimación de la productividad agrícola usando datos micro-económicos para el Perú. El método consiste en la estimación de una función de producción agraria, que permite recuperar la productividad como un residuo, y constituye una aplicación directa de desarrollos metodológicos recientes en la estimación de funciones de producción con datos de panel (e.g., Gandhi et al., 2013), pero aplicado en este artículo a datos de sección cru- zada. Debido a la menor información disponible para la estimación con respecto al caso de datos de panel, recurrimos a supuestos de formas funcionales. En particular, se escoge la función de elasticidad de sustitución constante, que permite una mayor flexibilidad que otras formas usadas previamente en la literatura empírica nacional, como la Cobb-Douglas. Encontramos que no hay sustento para la hipótesis de la existencia de retornos crecientes a escala; que la productividad está positivamente correlacionada con la edad, el sexo, y la educación; y negativamente relacionadacon el tamaño de la unidad agropecuaria y el poder de mercado.
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Dangou, Mohamad Ali Abdulla. "Investigations of the filtration parameters of drilling fluids for optimising oil well productivity." Thesis, University of Aberdeen, 2007. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU239344.
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The main objective of this research was to gain further understanding of the behaviour of oil wellbore fluid filtrates, the various factors affecting filter cake quality, and how these can be controlled to reduce the invasion of the filtrate around the wellbore region. The investigations were intended to define filtration behaviour and filter cake parameters at different fluids with various particle size distributions and various wellbore conditions that are: different filtration pressures, different filtration times, and different shear rates acting on the cake surface during dynamic filtration conditions. The results indicated that all the above mentioned filtration parameters have a various degree of influence on the filter cake and filtration parameters. The forces acting on a particle suspended in the wellbore fluids during dynamic cake particle deposition were also analyzed and a dynamic filtration model was developed. This model can be used to determine the average critical shear rate of these particles and the frictional coefficient factors of the particles with the cake surface. The model has then been modified to predict equilibrium filtration flow rate at any shear stress (above the critical value) applied on the cake surface. Investigations on the transient stage of the dynamic filtration agreed with literature and showed that the size of particles deposited onto the cake decreased with increasing cake thickness, causing the particle size distribution of the dynamic filter cake to alter with cake thickness.
24
Vopicka, Charles Edward. "Estimating site productivity from non-site trees a site index based approach /." CONNECT TO THIS TITLE ONLINE, 2007. http://etd.lib.umt.edu/theses/available/etd-05302007-162117/.
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Suhariyanto. "Productivity growth, efficiency and technical change in Asian agriculture : a Malmquist index analysis." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298849.
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Lehtonen, Julia, and Jack Ramström. "An in-depth comparison between remote and workplace bound workers productivity and well-being." Thesis, Umeå universitet, Företagsekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-185475.
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Working remotely away from the traditional office is a continuously growing trend. Due to advancements in technology, workers can conduct their work remotely through the use of electronic technologies. While there are benefits for both the companies and workers due to this change in working arrangements, some negative effects have also occurred. Previous studies on remote working have found positive effects such as increased productivity or higher levels of job satisfaction. Whereas, other studies have found negative aspects such as overworking, hard time to switch off after work and social isolation. Previous research has focused on examining telecommuters (employees who work from home part-time). Hence there is a research gap for studying employees who work solely from home. Also, most of the previous studies have focused on samples where all the respondents have the same profession/work-role, rather than contrasting between different ones. Moreover, previous studies stress the need for further investigation on the impact that remote work has on well-being. Since previous research is mostly quantitative, there is a need for more in-depth understanding of the effects of remote working. Given the identified research gaps, our purpose in this thesis is to compare remote workers to workplace bound workers in terms of productivity and well-being. In order to help fill the research gaps and reach the purpose of this study we formulated the research question: How do remote workers and workplace bound workers compare in terms of productivity and well-being? In order to answer the research question and achieve the purpose of this thesis, we conducted a qualitative study. The data was gathered through six semi-structured interviews with workers who have previously worked in the traditional office and are currently working solely remotely in the same job position. Mainly, our research found that the remote and office setting were quite balanced in terms of well-being and productivity in our sample. However, the remote setting proved to have more challenges related to it than the office setting in our case, such as higher levels of work intensification, social isolation and management style. No significant difference was identified in terms of how work-role affects remote work in terms of productivity and well-being, however, the personal characteristics of the respondents seemed to play a part in the results. Our study contributes to the growing literature on remote working by offering insights on both the challenges and positive aspects of working solely remotely from home within different work-roles and organizations. Moreover, we offer some managerial implications on how to mitigate the challenges connected to remote working. Lastly, we offer some recommendations for future research in the context of remote working.
27
Roberts, Carlene M. "Perspectives of Work-Life Balance: The Path to Maximizing Individual Well-Being and Organizational Productivity." Scholarship @ Claremont, 2016. http://scholarship.claremont.edu/cmc_theses/1246.
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The goal of this paper is to outline the existing perspectives of work-life balance, and to examine how they impact individual well-being and organizational productivity. The benefit of approaching work-life balance through the lens of personal and professional satisfaction is discussed. In addition, the author looks at the relationship between job satisfaction and job performance. The literature shows that satisfaction, well-being, and job performance are all related, and this poses greater implications for organizations. The author concludes with arguments in the present literature on the individual and organizational benefits of organizations adopting work-life balance policies.
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Hussain, Jakir. "Three Essays on the Measurement of Productivity." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36194.
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This doctoral thesis consists of three essays. In the first essay I investigate the presence of productivity convergence in eight regional pulp and paper industries of U.S. and Canada over the period of 1971-2005. Expectation of productivity convergence in the pulp and paper industries of Canadian provinces and of the states of its southern neighbour is high since they are trading partners with fairly high level of exchanges in both pulp and paper products. Moreover, they share a common production technology that changed very little over the last century. I supplement the North-American regional data with national data for two Nordic countries, Finland and Sweden, which provides a scope to compare the productivity performances of four leading players in global pulp and paper industry. I find evidence in favour of the catch-up hypothesis among the regional pulp and paper industries of U.S. and Canada in my sample. The growth performance is at the advantage of Canadian provinces relative to their U.S. counterparts. However, it is not good enough to surpass the growth rates of this industry in the two Nordic countries.
It is well-known that econometric productivity estimation using flexible functional forms often encounter violations of curvature conditions. However, the productivity literature does not provide any guidance on the selection of appropriate functional forms once they satisfy the theoretical regularity conditions. The second chapter of my thesis provides an empirical evidence that imposing local curvature conditions on the flexible functional forms affect total factor productivity (TFP) estimates in addition to the elasticity estimates. Moreover, I use this as a criterion for evaluating the performances of three widely used locally flexible cost functional forms - the translog (TL), the Generalized Leontief (GL), and the Normalized Quadratic (NQ) - in providing TFP estimates. Results suggest that the NQ model performs better than the other two functional forms in providing TFP estimates.
The third essay capitalizes on newly available high frequency energy consumption data from commercial buildings in the District of Columbia (DC) to provide novel insights on the realized energy use impacts of energy efficiency standards in commercial buildings. Combining these data with hourly weather data and information on tenancy contract structure I evaluate the impacts of energy standards, contractual structure of utility bill payments, and energy star labeling on account level electricity consumption. Using this unique panel dataset, the analysis takes advantage of detailed building-level characteristics and the heterogeneity in the building age distribution, resulting in buildings constructed before and after mandatory energy standards came into effect. Estimation results suggest that in commercial buildings constructed under a code, electricity consumption is lower by about 0.48 kWh per cooling degree hour. When tenants pay for their own utilities, consumption is lower by 0.82 kWh per cooling degree hour. The Energy Star effect is a 0.31 kWh reduction per cooling degree hour. Finally, peak savings for all three variables of interest occur at 2pm in the summer months, whereas peak summer marginal prices at DC's local electric utility occur at 5pm.
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Everard, Andrea. "An examination of time and industry effects on Strassmann's Information Productivity Index, evidence from the TSE300 Index industries." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0003/MQ43640.pdf.
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Gonzalez, Germán H. "Productivity Gap and Asymmetric Trade Relations: The Canada-United States of America Integration Process." Economía, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/117763.
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The usefulness of the European model of integration is currently subject to debate and the North American integration process has been largely ignored as a comparative framework. The asymmetrical relationship between Canada and the United States began a long time before NAFTA, and the study of this process could shed light on the usual problems faced by Latin American countries. This article attempts to encourage discussion about this topic. Particularly,there is evidence for a substantial and positive change in Canadian productivity at the time of the Canada-US Free Trade Agreement (CUFTA). However, the enactment of the North American Free Trade Agreement (NAFTA) does not seem to have had the same effect as the earlier treaty.La utilidad del modelo europeo de integración es actualmente sujeto de debate, mientras que el proceso de integración norteamericano ha sido largamente ignorado como un marco comparativo. La relación asimétrica entre Canadá y los Estados Unidos empezó hace mucho tiempo antes del NAFTA, y el estudio de este proceso podría dar luces en los problemas usuales enfrentados por países latinoamericanos. Este artículo intenta promover la discusión sobre este asunto.Particularmente, existe evidencia de un cambio positivo y sustancial en la productividad canadienseen el momento del acuerdo comercial entre Canadá y los Estados Unidos (CUFTA). Sin embargo, la promulgación del Acuerdo de Libre Comercio de Norteamérica (NAFTA) no pareceque haya tenido el mismo efecto que el tratado anterior.
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Tsao, Allison. "Examining the effects of activity based working on employees' work-life integration, well-being, and productivity." Thesis, Pepperdine University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10142044.
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Profound changes are happening in the globalized work environment, challenging the existing way individuals operate at work and the traditional role of the workplace. The aim of this study was to examine the effects of the physical and social work environment through the lens of activity based working (ABW) to understand the effects ABW had on an individual’s ability to integrate their work and nonwork lives and how this contributed to wellbeing and productivity. Twenty qualitative interviews were conducted across three Australian-based organizations that had implemented ABW. By studying the pre and post change impacts through the lens of Person-Environment Fit Theory and Self-Determination Theory (SDT), the study presented findings that identify a strong linkage between the physical and social environments and how this linkage is able to fulfill an individual’s psychological needs—relatedness, autonomy, and competence—as defined by SDT. The study identified a greater sense of relatedness as the main benefit of an ABW intervention and suggested that there is a greater role for authenticity to play in the workplace in order to foster greater levels of autonomy. The study also identified competence as an area that organizations should focus more on in order to build and sustain the necessary skills and capabilities to work in an ABW environment. Participants described benefits to mental and physical health and wellbeing as well as productivity as a result of the ABW intervention.
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Klinka, Karel. "Estimated decrease in productivity for pacific silver fir as elevation increases." Forest Sciences Department, University of British Columbia, 1998. http://hdl.handle.net/2429/667.
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When making decisions on which areas to harvest in a sustained yield, even-flow manner in mountainous areas such those in coastal British Columbia, it is important to know how timber productivity changes with elevation. This information allows foresters to decide
at what elevation to start increasing the rotation age and to decide at what elevation sustainable harvesting becomes infeasible due to low productivity. Since Pacific silver fir (Abies amabilis Dougl. ex Forbes) has an elevation range that extends from sea level nearly to the tree line (0 m to approximately 1,650 m; from the Coastal Western
Hemlock zone, through the Mountain Hemlock zone; to the lower limits of the Alpine Tundra zone), productivity-elevation relationships are especially important.
To acquire quantitative measures of productivity decrease with increasing elevation a regression equation relating site index (the height of the dominant trees at a base age of breast height age of 50 years) to elevation in southern coastal BC was developed. In turn, we used this regression as an input into the height driven yield model named the Variable Density Yield Prediction model (VDYP). The use of the VDYP model allows the site index values to be translated into actual productivity measures (e.g., volume per hectare, mean annual increment at culmination age).
33
Zhao, Yihai (Simon). "Relative bulk density as an index of soil compaction and forest productivity in British Columbia." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/10318.
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Soil compaction often limits conifer regeneration on sites degraded by construction of landings and roads, but inadequate understanding of compaction characteristics has sometimes led to inappropriate rehabilitation efforts. This warrants development of new methods to assess compaction and its relation to tree growth. The objective of this study was to develop a high-level integration indicator that will characterize compaction of forest soils and that could be correlated to tree height growth. Mineral particle density of soils from interior British Columbia (BC) forests varied significantly among the geographic locations. Oxalate-extractable Fe- and Al-oxides and particle size distribution (PSD) were related to soil and mineral particle densities, while soil organic matter (SOM) and Al- and Fe-oxides were important soil properties in relation to soil particle density. The significance of levels of single soil properties in predicting maximum bulk density (MBD) were in the order: plastic and liquid limits, organic matter content, oxalate-extractable oxide, and PSD. Stratification of the sample according to Atterberg limits improved the predictability of MBD, and variation in particle density was included in the prediction by other soil properties used in the models. Height growth of interior Douglas-fir (Pseudotsuga menziesii var. glauca [Bessin] Franco) was restricted when relative bulk density (RBD) was > 0.72. For lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) and hybrid white spruce (Picea glauca [Moench] Voss × engelmannii Parry ex Engelm.), an RBD of 0.60 - 0.63 corresponded to maximum height growth, while that of 0.78 - 0.84 appeared to limit height growth. The presence of surface organic material mitigated compaction and was often associated with lower RBD. Interior Douglas-fir and lodgepole pine planted in low elevation sites in north-central BC did not grow well and their height growth was weakly related to RBD. The results suggest that soil rehabilitation should be considered on disturbed sites where soil RBD is > 0.80.
Findings in this study have implications in assessing forest soil compaction and its effect on site productivity. The results will help predict soil behaviour and associated tree growth in response to timber harvesting and site rehabilitation.
34
Borchers, Matthew Richard. "THE EFFECTS OF HOUSING ON DAIRY COW COMFORT, IMMUNE FUNCTION, STRESS, PRODUCTIVITY, AND MILK QUALITY." UKnowledge, 2018. https://uknowledge.uky.edu/animalsci_etds/93.
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Mastitis and milk quality affect every dairy farmer across the globe. Sand bedded freestalls are the industry standard for cow comfort, welfare, and the control of environmental mastitis. Compost bedded packs may be a viable alternative to the sand bedded freestall.
Compost bedded packs are maintained at a consistent level of moisture, nutrients, and aeration to favor compost microorganisms. Greater bacteria counts in bedding have traditionally been associated with increased mastitis rates and mastitis pathogens can be found in the pack and on the teats of cattle housed in even well managed compost bedded pack barns. In spite of this, herd SCC often remains low in well managed herds. The relationship between stress and comfort in the housing environment was a primary focus of this research. Cows housed in environments with low stress and high comfort may be better able to defend themselves against pathogens. Establishing changes in immune function in response to housing environment would improve milk quality by contributing to the knowledge of how mastitis-causing pathogens are contracted.
An additional goal of this research was to determine the effect of compost bedded pack barns on thermoduric bacteria populations. Due to the increased temperatures associated with composting, thermoduric bacteria capable of surviving pasteurization are of potential concern in compost bedded packs. This research will investigate potential differences in thermoduric bacteria counts between compost bedded packs and sand bedded freestalls.
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K, C. Pratima, and C. Pratima K. "Effect of Climate Conditions on Land Surface Productivity Across the Mojave, Sonoran, and Chihuahua Deserts and Apache Highlands." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/626150.
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Understanding the patterns and relationships between land surface productivity and the climatic condition is essential to predict the impact of climate change. This study aims to understand spatial temporal variability and relationships of land surface productivity using Normalized Difference Vegetation Index (NDVI) and drought indices, mainly Standard Precipitation Index (SPI) and Standard Precipitation Evaporation Index (SPEI) across four ecoregions: Mojave, Sonoran, Apache Highlands and Chihuahua of the Southwest United States. Moderate Resolution Imaging Spectroradiometer (MODIS) Normalized Difference Vegetation Index (NDVI) and land cover data, and Parameter Regression on Independent Slopes Model (PRISM) precipitation and temperature data were used for analysis.
Using Mann-Kendall, I calculated the trends in annual and seasonal NDVI, SPI and SPEI datasets. I used the Pearson Correlation Coefficients to examine the response of integrated and monthly NDVI values to SPI and SPEI values. The positive and negative trends were found during the annual and monsoon seasons whereas only negative trends were found during the spring season for NDVI, SPI and SPEI values. The relationship between NDVI and coincident and antecedent SPEI values changed significantly by area and season for each of the ecoregions across the east-west seasonal precipitation gradient.
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Karaduman, Alper. "Data Envelopment Analysis And Malmquist Total Factor Productivity (tfp) Index: An Application To Turkish Automotive Industry." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607821/index.pdf.
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This thesis shows how the relative efficiency of automotive companies can be evaluated and how the changes in productivity of these companies by time can be observed. There are 17 companies in the analysis which are the main automotive manufacturers of Turkish automotive industry. A method called stepwise approach is used to determine the input and output factors. The two input variables used are the company&rsquos Payment for Raw Materials and Components and Payment for Wages and Insurances of Employees
the three output variables are Domestic Sales, Exports and Capacity Usage. The panel data that covers the time period between years 2001 and 2005 is obtained from OSD (Automotive Manufacturers Association). The efficiency analysis is performed according to basic Data Envelopment Analysis (DEA) models which are Charnes, Cooper and Rhodes (CCR) models and Banker, Charnes and Cooper (BCC) models. The software LINGO 10 is used for solving the linear programming models. After finding the overall efficiency, technical efficiency and scale efficiency of each company for each year, the changes in the efficiencies are analyzed by using Malmquist Total Factor Productivity (TFP) Index. The results are illustrated by the help of many tables and graphs for better understanding. When the results in tables and graphs are analyzed, the negative effect of 2001 economic crisis on automotive industry can be observed. Besides, it is seen that the efficiency changes by time show variance from company to company because they produce 7 types of vehicles and there are important differences between them such as production technology, market, demand, etc.
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Maniadakis, Nikolaos. "A cost Malmquist index approach to productivity measurement with an application to health care services provision." Thesis, University of Warwick, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323208.
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Barnes, Mallory L., M. Susan Moran, Russell L. Scott, Thomas E. Kolb, Guillermo E. Ponce-Campos, David J. P. Moore, Morgan A. Ross, Bhaskar Mitra, and Sabina Dore. "Vegetation productivity responds to sub-annual climate conditions across semiarid biomes." WILEY-BLACKWELL, 2016. http://hdl.handle.net/10150/616989.
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In the southwest United States, the current prolonged warm drought is similar to the predicted future climate change scenarios for the region. This study aimed to determine patterns in vegetation response to the early 21st century drought across multiple biomes. We hypothesized that different biomes (forests, shrublands, and grasslands) would have different relative sensitivities to both climate drivers (precipitation and temperature) and legacy effects (previous-year's productivity). We tested this hypothesis at eight Ameriflux sites in various Southwest biomes using NASA Moderate-resolution Imaging Spectroradiometer Enhanced Vegetation Index (EVI) from 2001 to 2013. All sites experienced prolonged dry conditions during the study period. The impact of combined precipitation and temperature on Southwest ecosystems at both annual and sub-annual timescales was tested using Standardized Precipitation Evapotranspiration Index (SPEI). All biomes studied had critical sub-annual climate periods during which precipitation and temperature influenced production. In forests, annual peak greenness (EVImax) was best predicted by 9-month SPEI calculated in July (i.e., January-July). In shrublands and grasslands, EVImax was best predicted by SPEI in July through September, with little effect of the previous year's EVImax. Daily gross ecosystem production (GEP) derived from flux tower data yielded further insights into the complex interplay between precipitation and temperature. In forests, GEP was driven by cool-season precipitation and constrained by warm-season maximum temperature. GEP in both shrublands and grasslands was driven by summer precipitation and constrained by high daily summer maximum temperatures. In grasslands, there was a negative relationship between temperature and GEP in July, but no relationship in August and September. Consideration of sub-annual climate conditions and the inclusion of the effect of temperature on the water balance allowed us to generalize the functional responses of vegetation to predicted future climate conditions. We conclude that across biomes, drought conditions during critical sub-annual climate periods could have a strong negative impact on vegetation production in the southwestern United States.
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Funk, Samuel Mahlon. "Efficiency and productivity measurements to analyze farm-level impacts from adoption of biotechnology enhanced soybeans." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/20563.
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Doctor of PhilosophyDepartment of Agricultural Economics
Allen M. Featherstone
This study focuses on the productivity and on-farm efficiency impacts of adopting biotechnology enhanced soybeans (BES). Previous research suggests the adoption of BES and subsequent time savings resulted in labor allocation to off-farm employment and reduced on-farm efficiency. Using continuous panel data for 129 farms enrolled in the Kansas Farm Management Association (KFMA) with production and financial crop records from 1993 through 2011 that also provided information on their BES adoption experience, this study provides estimates on the technical efficiency, cost efficiency, and Malmquist productivity indexes (MI) with decompositions into efficiency change (EC) and technical change (TC) to provide insights on the impacts of adopting BES for set of sample farms. Using data envelopment analysis to construct nonparametric efficiency frontiers and measurements assuming constant returns-to-scale (CRS) and variable returns-to-scale (VRS) technologies for the farms, this study provides insights on the impact of yield impacts of BES adoption. A biennial Malmquist productivity index (BMI) is developed to consider estimation of the productivity impacts between BES adopters and non-adopters assuming VRS. This analysis used five input categories: Labor, general, direct inputs, maintenance, and energy; and five outputs: corn, soybeans, sorghum, wheat, and other crops. Tobit regression analysis of the panel of Kansas farms provided evidence of a positive impact from adoption of biotechnology enhanced soybeans on on-farm technical efficiency. Kolmogorov-Smirnov goodness-of-fit distributional hypothesis tests showed significant differences between analyzing the farms under CRS and VRS assumptions. T-tests showed a bias existed when assuming CRS if the true underlying technology was VRS in productivity analysis. However, there was not a strong statistically significant difference between the distributions of productivity measures from the underlying populations of BES adopters and non-adopters in the sample of Kansas farms. A revenue-indirect cost efficiency analysis of the sample farms demonstrated that different conclusions were reached under CRS and VRS when considering the differences in the average of the means of estimated efficiency scores and Tobit regression results considering BES adoption. Assuming CRS resulted in positive marginal effects for adopting BES of 0.017 significant at the 5% level. The marginal effect of BES adoption was not statistically significant under VRS.
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Lumban, Gaol Ardhi. "Transient and Pseudosteady-State Productivity of Hydraulically Fractured Well." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11775.
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Numerical simulation method is used in this work to solve the problem of transient and pseudosteady-state flow of fluid in a rectangular reservoir with impermeable boundaries. Development and validation of the numerical solution for various well-fracture configurations are the main objectives of this research. The specific case of horizontal well intersected by multiple transverse fractures is the focus of the investigation.
The solutions for different operating conditions, constant rate and constant pressure, are represented in the form of transient – peudosteady-state productivity indices. The numerical simulator is validated by comparing results to known analytical solution for radial flow, existing models of productivity for vertical well intersected by vertical fracture, and also with published tables of shape factors.
Numerical simulation is a powerful tool to predict well performance. The complexities of well-fracture configurations can be modeled in a truly 3-dimensional system and the pressure and productivity responses for all of the flow regimes can be computed efficiently, enabling optimization of the well-fracture system.
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Miller, Nathan. "Increasing Well Productivity in Gas Condensate Wells in Qatar's North Field." Thesis, 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7356.
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Condensate blockage negatively impacts large natural gas condensate reservoirs all over the world; examples include Arun Field in Indonesia, Karachaganak Field in Kazakhstan, Cupiagua Field in Colombia,Shtokmanovskoye Field in Russian Barents Sea, and North Field in Qatar. The main focus of this thesis is to evaluate condensate blockage problems in the North Field, Qatar, and then propose solutions to increase well productivity in these gas condensate wells. The first step of the study involved gathering North Field reservoir data from previously published papers. A commercial simulator was then used to carry out numerical reservoir simulation of fluid flow in the North Field. Once an accurate model was obtained, the following three solutions to increasing productivity in the North Field are presented; namely wettability alteration, horizontal wells, and reduced Non Darcy flow.
Results of this study show that wettability alteration can increase well productivity in the North Field by adding significant value to a single well. Horizontal wells can successfully increase well productivity in the North Field because they have a smaller pressure drawdown (compared to vertical wells). Horizontal wells delay condensate formation, and increase the well productivity index by reducing condensate blockage in the near wellbore region. Non Darcy flow effects were found to be negligible in multilateral wells due to a decrease in fluid velocity. Therefore, drilling multilateral wells decreases gas velocity around the wellbore, decreases Non Darcy flow effects to a negligible level, and increases well productivity in the North Field.
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Hwa-Hann, Cheng, and 鄭華漢. "Estimation of Input-Oriented Productivity Efficiency Index and Malmquist Productivity Index of Taiwanese Banking Sector." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/25539598754418988834.
Full textAbstract:
碩士嶺東科技大學
財務金融研究所
95
This paper applies Data Envelope Analysis (DEA) method and linear programming to calculate Input-oriented productivity indices such as Constant Return Scale (CRS), Varying Return Scale (VRS) and Scale Efficiency (SE). Further, calculate cross-sectional input-oriented productivity Malmquist index, and decompose it into technical efficiency change index and technical structural change index. We applied input-oriented productivity efficiency and index onto Taiwanese banking sector, in pursuit of precise estimation of the input-oriented productivity efficiency and index of Taiwanese banking sector. Empirical study has shown that during 1995 to 2003, constant return scale of Taiwanese banking sector left 20% to be improved, varying return scale has shown an inefficiency of 12%, and Scale efficiency has shown a 9% of management inefficiency. In other words, during the period of study, input-oriented productivity index of Taiwanese banking sector approaches 1, which means that there is no obvious improvement. And, technical efficiency change index is lower than 1, which means there exists minor technical improvement. Drawing a conclusion, namely, management inefficiency has nibbled minor technical improvement and made the Taiwanese banking sector lack of significant improvement during recent ten years.
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Hwang, Donghyun Leo. "Comparison of the Malmquist Multifactor productivity index and the Malmquist productivity index and their decomposition." 2003. http://purl.galileo.usg.edu/uga%5Fetd/hwang%5Fdonghyun%5Fl%5F200308%5Fma.
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SHIH, YU-CHEN, and 石育禎. "Banking Efficiency and Productivity Analysis of Eight Asian Countries:Meta-frontier Malmquist Productivity Index." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/8w4fu8.
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碩士國立臺北大學
經濟學系
104
In this paper, the Bank of China, Taiwan, Japan, Indonesia, Thailand, the Philippines, India, Pakistan and above eight countries as the research object, using a non-parametric estimation analysis of data envelopment analysis and Maxwell productivity index to explore these eight countries to each other efficiency differences, the paper through efficiency analysis to investigate the efficiency difference eight countries among banks through Meta-DEA technical gap ratio (technical gap ratio; TGR) as comparing national bank efficiency standards proposed based on the relevant views allow our banks to enhance competition force. We found that the efficiency of an integrated regional, technical efficiency in each region, we found that the efficiency of the technology in Southeast Asia gradually catch up with the bank in Northeast Asia, South Asia has the lowest regional technical efficiency in three areas; and on regional scale efficiency point of view , the size of the three regions are similar, the gap began to appear in 2011, and finally with the highest efficiency of scale in Southeast Asia, followed by South Asia, the lowest in the Northeast Asia, Northeast Asia, the bank scale efficiency of such a big change in this period is For what reasons caused, worth exploring. We can see that in 2008, the current financial crisis on the efficiency of most Asian countries, banks are not much impact, is the beginning of the reaction in the next few years before, because this country has not suffered a major storm blow; in 2012 these years, many countries are significant fluctuations, only a small part of the country ride out, this may be a topic worthy of study in the future, to explore why in Asia, the impact of the financial turmoil in Europe and America is not as Like many European countries are now also to the impact of the financial turmoil, and did not recover to pre-crisis level of experience.
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JULONG, SU, and 蘇炬龍. "Analyze productivity and risk of Taiwan banks with meta frontier environment productivity index." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/38116586122590417660.
Full textAbstract:
碩士嶺東科技大學
財務金融研究所
102
The banking industry is more than a pivot of intermediary funds in an economic system after two recent financial innovations. A banking operation needs multiple investments which will come along with risk. Recent researches about the efficiency of the banking industry has started to focus on banking operations with risk. Most of this research agrees that, leaving the risk factors aside, it is easy to have bias in the estimating of banking efficiency. Oh (2010) considered the meta frontier and unexpected productivity, proposing the meta frontier Malmquist-Luenberger productivity growth index (MML). It can simultaneously estimate the firm’s property and risk and affect the efficiency and productivity will be affected.In this project, we compare banks that have merged during the financial innovations and the banks that have not. We employ the MML model of Oh (2010) to estimate the difference of the catch-up effect; the innovation affect; and leading technological affect between these two kinds of banks. And we will then give our advice based on the result.
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Huang, Shu-Yu, and 黃舒瑜. "Efficiency and Productivity Analysis of Taiwan’s Semiconductor Industry：using a Three-stage Malmquist Productivity Index Approach." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/92981483387159200846.
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碩士國立臺北大學
經濟學系
97
In Taiwan, the semiconductor industry is the key industry supported by government, and has been one of the main cornerstones of the economic development. It also plays an important role in the global semiconductor market. However, the outbreak of the US subprime crisis and over-optimism of Vista system in 2007, plus the global financial crisis and substantial depreciation of the Korean won in 2008, lead Taiwan DRAM Industry to a crucial competition. Thus, we will adopt the concept of Fried et al.(1999) Four-stage DEA model and Färe, et al.(1994) Malmquist Productivity Index to construct a three-stage Malmquist Productivity Index model to discuss the current development of Taiwan's semiconductor industry and comprehend further the resources allocation of different firms efficient or not. At last, it would give some production decision for producers in order to improve the competitiveness of the whole industry and firms. Empirical results show that efficiency scores and productivities become better after considering the possible effect from environmental variables. Therefore, in order to truly reflect the operating performance that considers the environment variables impact on decision-making is necessary. The efficiency scores that consider the impact of environmental variables are between 0.726 and 0.844. It implies that 92 semiconductor firms averagely waste 15.6% to 27.4% factor inputs with the result of pure technical inefficiency. During the research period, the Malmquist TFP of the whole semiconductor industry has little deceased and the decrease of TFP in semiconductor industry mainly results from that the degree of technical efficiency improvement is more than technical regress. Thus, if firms could not keep up with technological progress under the rapid development of semiconductor processing, it will be eliminated through competition.
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Hsu, Chin Jung, and 許秦榕. "The Productivity of Private Comprehensive Universities in Taiwan—An Application of Quality Malmquist Productivity Index." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/56910163340285375991.
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Chen, Jyun-Yang, and 陳鈞揚. "Efficiency and productivity analysis of Taiwanese securities firms－an application of Hicks-Moorsteen productivity index." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/gu6u45.
Full textAbstract:
碩士國立政治大學
經濟學系
106
This study adopted the sample from 2012 to 2016 of the 42 integrated securities firms in Taiwan. This paper mainly uses Hicks-Moorsteen total factor productivity(TFP) and the decomposition to analyze the 4 parts of efficiency and productivity, includes: the overall securities industry in Taiwan, the comparison of individual securities firms, the influence of exogenous variables, and then do the statistical test to observe whether there is any difference between Hicks-Moorsteen TFP index and Malmquist TFP index. Malmquist TFP index is the most common index used by the literature of efficiency research. The empirical results show that the productivity growth of the securities industry in Taiwan was slow because the weak of the efficiency of productivity slow down the productivity growth. The empirical results of the overall securities industry in Taiwan and the comparison of individual securities both sum up the importance of improving scale efficiency. The empirical evidence of the influence of exogenous variables shows that foreign securities firms have a positive relationship with the improvement of efficiency; while business concentration has a positive impact on the efficiency of commodity portfolio, it has a negative impact on productivity; increasing capital has a negative relationship with efficiency and productivity; increasing market share has a positive impact on productivity, but it has a negative impact on scale efficiency. The last part of the empirical evidence shows that this sample has no statistically significant difference between Malmquist TFP index and Hicks-Moorsteen TFP index. However, the difference between the progress and regress is still in a certain proportion.
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Chen, Ching-Hung, and 陳慶鴻. "A Study on the Productivity Efficiency of Farmers’ Association with Application of DEA and Malmquist Productivity Index." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/87729661004713329990.
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碩士國立高雄應用科技大學
財富與稅務管理系碩士在職專班
103
This study applied data envelopment analysis and the Malmquist productivity index to evaluate the 15 county farmers’ associations of Taiwan from 2004 to 2012. The output was measured by the number of farmers’ association members, and the employees and operating expenses were two inputs. The results show that the overall efficiency of Taipei County, Hsinchu County, and Pingtung County are the best. With further decomposing, in terms of pure technical efficiency, Taipei County, Hsinchu County, and Pingtung County perform better than other counties; in terms of scale efficiency, Pingtung County is the best. The Malmquist productivity index analysis shows that the total factor productivities of Ilan County, Taoyuan County, and Hualien County were improving during the sample period.
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Rodrigues, Maria Francisca Cantante Carvalho. "Employees’ Resilience and Productivity: The Mediating Role of Well-being." Master's thesis, 2019. http://hdl.handle.net/10400.26/30217.
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During this investigation, we examined three variables in order to understand the
mediating role of employee well-being in the relationship between resilience and
performance. Resilience, representing the only independent variable of this study, and was
assessed according to Carmeli, Friedman, and Tishler, 2013. Employee performance in the
workplace is the dependent construct of the current study and was evaluated through the
performance scale of Williams and Anderson (2001). Furthermore, employee well-being in
the workplace was measured through work engagement and burnout dimension which
represent the positive and negative aspect of the construct, respectively (Maslach, Schaufeli,
& Leiter, 2001; Schaufeli, Bakker, & Salanova, 2006).
Up to date, to the best of our knowledge, no studies were carried out exploring the
relationship between all three constructs from an organizational perspective. Consequently,
the principal aim of this study was to understand and provide evidence of the mediating role
of employee well-being to explain the relationship between resilience and performance.
The analyzed sample consisted of 119 employed participants, and the data were collected
through a semi-structured questionnaire distributed online. The main results show that there is
a significant and positive relationship between resilience and work engagement. In addition,
work engagement seems to partially mediate the relationship between resilience and
performance, since a significant direct relationship between resilience and performance was
also observed.
Finally, we discussed practical and theoretical results implications.