Academic literature on the topic 'Beta hedging'
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Journal articles on the topic "Beta hedging"
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Levi, Yaron, and Ivo Welch. "Symmetric and Asymmetric Market Betas and Downside Risk." Review of Financial Studies 33, no. 6 (September 19, 2019): 2772–95. http://dx.doi.org/10.1093/rfs/hhz108.
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Abstract Our paper explores whether a symmetric plain or an asymmetric down-beta is a better hedging measure (Roy 1952; Markowitz 1959). Unlike Ang, Chen, and Xing (2006) and Lettau, Maggiori, and Weber (2014), we find that the prevailing plain market beta is the better predictor, even for crashes. It also predicts the subsequent down-beta (i.e., beta measured only on days when the stock market had declined) better than down-beta itself. Stocks with higher down-betas ex ante also do not earn higher average rates of return ex post. Thus, down-betas are useful for neither hedging nor risk-pricing purposes.
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de Boer, Sanne. "Smart Currency Hedging for Smart Beta Global Equities." Journal of Investing 25, no. 4 (November 30, 2016): 64–78. http://dx.doi.org/10.3905/joi.2016.25.4.064.
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Lee Adams, Courtney. "Practical Applications of Smart Currency Hedging for Smart Beta Global EquitiesSmart Currency Hedging for Smart Beta Global Equities Sanne de Boer." Practical Applications 4, no. 5 (July 2017): 1–4. http://dx.doi.org/10.3905/pa.2017.4.5.226.
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Foglia, Matteo, Maria Cristina Recchioni, and Gloria Polinesi. "Smart Beta Allocation and Macroeconomic Variables: The Impact of COVID-19." Risks 9, no. 2 (February 4, 2021): 34. http://dx.doi.org/10.3390/risks9020034.
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Smart beta strategies across economic regimes seek to address inefficiencies created by market-based indices, thereby enhancing portfolio returns above traditional benchmarks. Our goal is to develop a strategy for re-hedging smart beta portfolios that shows the connection between multi-factor strategies and macroeconomic variables. This is done, first, by analyzing finite correlations between the portfolio weights and macroeconomic variables and, more remarkably, by defining an investment tilting variable. The latter is analyzed with a discriminant analysis approach with a twofold application. The first is the selection of the crucial re-hedging thresholds which generate a strong connection between factors and macroeconomic variables. The second is forecasting portfolio dynamics (gain and loss). The capability of forecasting is even more evident in the COVID-19 period. Analysis is carried out on the iShares US exchange traded fund (ETF) market using monthly data in the period December 2013–May 2020, thereby highlighting the impact of COVID-19.
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Lee Adams, Courtney. "Practical Applications of Smart Currency Hedging for Smart Beta Global Equities." Practical Applications 5, no. 1 (July 31, 2017): 1.6–4. http://dx.doi.org/10.3905/pa.2017.5.1.226.
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Jostova, Gergana, and Alexander Philipov. "Bayesian Analysis of Stochastic Betas." Journal of Financial and Quantitative Analysis 40, no. 4 (December 2005): 747–78. http://dx.doi.org/10.1017/s0022109000001964.
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AbstractWe propose a mean-reverting stochastic process for the market beta. In a simulation study, the proposed model generates significantly more precise beta estimates than GARCH betas, betas conditioned on aggregate or firm-level variables, and rolling regression betas, even when the true betas are generated based on these competing specifications. Our model significantly improves out-of-sample hedging effectiveness. In asset pricing tests, our model provides substantially stronger support for the conditional CAPM relative to competing beta models and helps resolve asset pricing anomalies such as the size, book-to-market, and idiosyncratic volatility effects in the cross section of stock returns.
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Gallien, Florent, Serge Kassibrakis, and Semyon Malamud. "Hedge or Rebalance: Optimal Risk Management with Transaction Costs." Risks 6, no. 4 (October 8, 2018): 112. http://dx.doi.org/10.3390/risks6040112.
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We solve the problem of optimal risk management for an investor holding an illiquid, alpha-generating fund and hedging his/her position with a liquid futures contract. When the investor is subject to a lower bound on net return, he/she is forced to reduce the total risk of his/her portfolio after a loss. In this case, he/she faces a tradeoff of either paying the transaction costs and deleveraging or keeping his/her current position in the illiquid instrument and hedging away some of the risk while keeping the residual, unhedgeable risk on his/her balance sheet. We explicitly characterize this tradeoff and study its dependence on asset characteristics. In particular, we show that higher alpha and lower beta typically widen the no-trading zone, while the impact of volatility is ambiguous.
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Zhang, Mengfei, and Frank J. Fabozzi. "On the Estimation of the SABR Model’s Beta Parameter: The Role of Hedging in Determining the Beta Parameter." Journal of Derivatives 24, no. 1 (August 31, 2016): 48–57. http://dx.doi.org/10.3905/jod.2016.24.1.048.
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GULKO, LES. "THE ENTROPY THEORY OF BOND OPTION PRICING." International Journal of Theoretical and Applied Finance 05, no. 04 (June 2002): 355–83. http://dx.doi.org/10.1142/s021902490200147x.
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An informationally efficient price keeps investors as a group in the state of maximum uncertainty about the next price change. The Entropy Pricing Theory (EPT) captures this intuition and suggests that, in informationally efficient markets, perfectly uncertain market beliefs must prevail. When the entropy functional is used to index collective market uncertainty, then the entropy-maximizing consensus beliefs must prevail. The EPT resolves the ambiguity of arbitrage-free valuation in incomplete markets. The EPT produces a new bond option model that is similar to Black–Scholes' with the lognormal distribution replaced by a beta distribution. Unlike alternative models, the beta model is valid for arbitrary term structure dynamics and for arbitrary credit risk of the underlying bonds. Option replication and hedging under the beta model accounts for random changes in the underlying bond price, price volatility and short-term interest rates.
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Yang, Yifan, Frank J. Fabozzi, and Michele Leonardo Bianchi. "Stochastic Alpha-Beta-Rho Hedging for Foreign Exchange Options: Is It Worth the Effort?" Journal of Derivatives 23, no. 2 (November 30, 2015): 76–89. http://dx.doi.org/10.3905/jod.2015.23.2.076.
Full textDissertations / Theses on the topic "Beta hedging"
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Leite, Gustavo Ribas de Almeida. "Hedge de crédito através de equity: uma análise empírica com uso de ativos corporativos brasileiros." reponame:Repositório Institucional do FGV, 2011. http://hdl.handle.net/10438/9777.
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This paper aims to analyze the results of an operation to hedge a diversified credit portfolio through the use of equity. Initially, a reference to the main theoretical aspects of this dissertation with their definitions and literature review will be made. Furthermore, there will be an explanation about the basic parameters of the selection of the sample used and the period during which such protection strategy will be implemented.
Este trabalho tem como objetivo analisar os resultados de uma operação de hedge de um diversificado portfólio de crédito de empresas brasileiras através do uso de ativos de equity. Inicialmente, faz-se uma alusão aos principais aspectos teóricos da presente dissertação com suas definições e revisão bibliográfica. Posteriormente, são apresentados os parâmetros básicos da seleção da amostra utilizada e do período durante o qual tal estratégia de proteção será implementada.
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Lema, Salome Marie Alice. "Restrictive measures on capital inflow in Brazil in the OTC derivative market: impact on non-financial firms." reponame:Repositório Institucional do FGV, 2016. http://hdl.handle.net/10438/17524.
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In August 2011, the Brazilian government taxed short positions in the foreign exchange (FX) derivative market in order to weaken the surge of post-crisis capital inflow, discourage carry trade strategies on the Real and avoid further local currency appreciation. Nevertheless, nonfinancial firms are also end-users of derivatives and might have suffered in case financial institutions transfer the regulatory cost to their clients in the real economy. To the extent that this tax increases the cost of hedging, firms may decide to hedge less, causing an increase in their exposure to currency risk. This paper aims at analysing if this regulatory change had an impact on Brazilian non-financial firms FX exposure, measured by the sensitivity of stock prices to currency fluctuation (FX-Beta). Therefore, it seeks to compare the FX beta of Brazilian non-financial listed firms before and after the implementation of the measure, to assess their degree of exposure to currency risk. In accordance with an increasing cost of hedging for those companies, results show that the beta difference also reached a riskier level.
Em agosto de 2011, o governo brasileiro passou a tributar posições vendidas no mercado de derivativos cambiais para diminuir o influxo de capital estrangeiro no pós-crise, desencorajar operações de carry trade e evitar que o real continuasse a se valorizar frente ao dólar. No entanto, empresas não financeiras também são usuárias de derivativos, e podem ter tido seus custos de proteção cambial aumentados, caso as instituições financeiras tenham transferido esse custo adicional para seus clientes na economia real. Na medida em que o tributo aumenta o custo de fazer proteção cambial com derivativos, as empresas podem ter decidido proteger uma parcela menor de sua exposição, causando um aumento em sua exposição cambial. Essa dissertação analisa se essa mudança regulatória teve um impacto na exposição cambial das empresas não financeiras, medida pela sensibilidade do preço das ações às variações cambiais (FX-Beta). Assim, o estudo compara os FX-Betas das empresas brasileiras antes e depois da implementação do tributo, para medir o grau de mudança em suas exposições cambiais. Em linha com o aumento no custo do hedge para essas empresas, os resultados mostram alguma evidência de que algumas empresas se tornaram mais expostas ao câmbio.
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Cho, Young-Hye. "Time-varying betas and market microstructures in option markets /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p9981964.
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Garcia-Bernardo, Javier. "Gene expression noise in stress response as a survival strategy in fluctuating environments." ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/515.
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Populations of cells live in uncertain environments, where they encounter large variations in nutrients, oxygen and toxic compounds. In the fluctuating environment, cells can sense their surroundings and express proteins to protect themselves against harmful substances. However, if the stressor appears infrequently or abruptly, sensing can be too costly or too slow, and cells cannot rely solely on it. To hedge against the sudden appearance of a stressor, cell populations can also rely on phenotypic diversification through bet-hedging. In bet-hedging, cells exploit noise in gene expression or use multistable genetic networks to produce an heterogeneous distribution of resistance-conferring protein levels. In this thesis, we analyze novel roles of noise in biological systems. Through a combination of modeling and stochastic simulations, we find that noise can coordinate multi-component stress response mechanisms in a subset of the population with no extra cost. In addition, we use evolutionary algorithms to analyze the conditions where the benefits provided by noise in gene expression are equivalent to those of a more complicated, bistable distribution of protein levels. Our results show that for cells living in noisy fluctuating environments, both noise in gene expression and bistability show similar growth rates, meaning that noise in gene expression can be an effective bet-hedging strategy.
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Azizi, Afnan. "Bet Hedging in Pdr5-mediated Drug Resistance and a Mechanism for its Regulation." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31593.
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Human health is increasingly threatened by the emergence of multiply drug resistant malignant organisms. Yet, our understanding of the numerous ways by which such resistance arises is modest. Here, we present evidence of a bet hedging strategy in the budding yeast, Saccharomyces cerevisiae, to counter the effects of cytotoxic drugs through the action of Pdr5, an ATP-binding cassette transporter. We have employed flow cytometry and fluorescent activated cell sorting to probe the expression levels of a GFP-tagged version of PDR5 in individual cells. The results obtained from these experiments demonstrate that each yeast population is variable in the levels of Pdr5 production, and a small subpopulation of cells produces this efflux pump at much higher quantities than the population average. Consequently, cells with high and low levels of Pdr5 grow differentially in presence and absence of cycloheximide, a cytotoxic drug. These properties are highly suggestive of a bet hedging strategy mediated by Pdr5 levels. We further link this bet hedging strategy to the transcriptional regulatory network of PDR5 consisting of two major transcription factors, Pdr1 and Pdr3. Our analysis suggests that a self-activating feedback loop acting on Pdr3 plays an important role in generation of the aforementioned subpopulation. Furthermore, our results point to a large difference in the activity of these two regulators wherein Pdr3 is notably stronger than Pdr1. The disparity in their activity could indicate a mechanism for generation of the observed proportions of subpopulations with regards to the level of Pdr5.
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Burgos, Andrés C. "Information-theoretic models of communication in biological systems." Thesis, University of Hertfordshire, 2017. http://hdl.handle.net/2299/19509.
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This thesis aims to find general principles governing the behaviour of biological systems, with a particular emphasis in the communicational (social) aspect of these systems. Communication between biological entities plays a major role in their evolution, enabling them to exchange information about their environment and thereby improving their chances of survival. Communication also plays a pivotal role in the organisation of populations of organisms, clearly observed in social insects, but present also at least in bacteria, plants, fungi, animals and humans. It is also theorised that the genetic code is a by-product of the establishment of an innovation-sharing protocol between primitive cells [Vetsigian et al., 2006]. This thesis is mainly concerned with identifying necessary conditions for the emergence of communicational codes, and the problems that arise with their establishment. For this purpose, we introduce an information-theoretic framework where species maximise their growth rate by following a Kelly-gambling strategy to bet on environmental conditions. Information theory provides a powerful tool for abstracting away mechanisms and for focusing on hard limits of a system's dynamics which cannot be circumvented. We begin by exploring the relation between information exchange and limited resources. We show that a transition from cooperation to antagonism in the exchange of environmental information follows from a change in the availability of resources, from abundant to scarce. We then assume a non-competitive scenario with abundance of resources, where conflicts in a population occur only at a communicational (informational) level, rather than on the physical level, such as competing for (physical) resources. However, traditional Shannon communication is non-semantic, as opposed to the semantic communication observed in biological systems, which is necessary for capturing conflicts in communication. In the traditional use of information theory, it is assumed that every organism knows how to \interpret" the information offered by other organisms. However, this assumes that one \knows" which other organisms one observes, and thus which code they use. In our model, however, we wish to preclude that: namely, we will do away with the assumption that the identity of the organisms who send the messages and those who receive them is known, and the resulting usable information is therefore influenced by the universality of the code used and by which organisms an organism is \listening" to. We introduce a model which captures semantic communication in information-theoretic terms, where organisms talk to each other in a communication network. We show that, for particular population structures, when organisms cannot identify which other organisms they talk to, the adoption of a universal code emerges as a solution for full interpretation of the shared information. However, the evolution and establishment of universal codes for communication introduces vulnerabilities: organisms can be exploited by parasites. We de ne two types of parasites whose strategies have different levels of complexity and study the co-evolution of a host (the population) and a parasite by optimising their respective objective functions in stages. First, we consider a disruptive parasite (a troll) that inflicts harm in a host by minimising a population's mutual understanding, and then a more complex parasite, which manipulates the members of the population via their codes (the puppetmaster). We show emergent characterisations of both parasites, as well as which host configurations are robust against parasites and show adaptive properties. This thesis introduces a framework which allows the study of informational properties in the host-parasite co-evolution, where the rules of the parasite's habitat, the host, are the outcome of an evolutionary process, and where these very same rules are those that allow the parasite to exploit the host.
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Jing, Wenyang. "A Microfluidic Volume Sensor for Single-Cell Growth Measurements." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34770.
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The multidisciplinary field of microfluidics has shown great promise for research at the interface of biology, chemistry, engineering, and physics. Laminar flow, versatile fabrication, and small length scales have made microfluidics especially well-suited for single-cell characterization. In particular, the evaluation of single-cell growth rates is of fundamental interest for studying the cell cycle and the effects of environmental factors, such as drugs, on cellular growth. This work presents aspects in the development of a microfluidic cell impedance sensor for measuring the volumetric growth rate of single cells and covers its application in the investigation of a new discovery relating to multidrug resistance in S. cerevisiae. While there are many avenues for the utilization and interpretation of growth rates, this application focused on the quantitative assessment of biological fitness—an important parameter in population genetics and mathematical biology. Through a combination of growth measurements and optics, this work concludes a novel case of bet-hedging in yeast, as well as the first ever case of bet-hedging in eukaryotic multidrug resistance.
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Pozzi, Adrien C. "Rôles adaptatifs et contraintes de la sporulation chez les microorganismes associés aux plantes : cas de la sporulation in planta dans la symbiose actinorhizienne Frankia (Frankiaceae)–Alnus (Betulaceae)." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10359/document.
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Frankia est une actinobactérie capable d'établir une symbiose racinaire avec les plantes actinorhiziennes dont le genre Alnus. Seulement certaines souches de Frankia sont capables de sporuler in planta, ce qui est illustré par la présence (Sp+) ou l'absence (Sp–) de sporanges dans les cellules végétales de la nodosité. C’est à notre connaissance un cas unique de sporulation endophyte. Cependant la description et l’interprétation écologique de ce trait d’histoire de vie (THV) original étaient incomplètes. Notre contribution à l’étude de la sporulation in planta des Frankia infectives de l’aulne intègre des approches théorique, descriptive et expérimentale, pour préciser (i) l’influence relative de la souche bactérienne, de l’espèce de la plante-hôte et des conditions pédoclimatiques sur ce THV, (ii) le rôle de la variabilité environnementale sur la distribution, la diversité et la sélection du trait, ainsi que (iii) les coûts et bénéfices associés pour les deux partenaires. Nous avons démontré pour la première fois que la sporulation in planta est un THV (i) spécifique de certaines lignées de Frankia, (ii) majeur pour en comprendre l'histoire évolutive et (iii) significativement corrélé à des caractéristiques génétiques des souches. Nous avons également confirmé que l’occurrence du trait varie selon l’environnement. Nous avons enfin établi un modèle de l'évolution du trait abordant sa valeur adaptative. L’ensemble des réflexions menées et des résultats obtenus nous permet de discuter de la sporulation in planta dans le cadre d’un continuum de stratégies symbiotiques, et plus généralement de discuter de l’écologie évolutive des symbioses entre microorganismes et plantesFrankia sp. is a telluric actinobacteria able to establish a root symbiosis with actinorhizal plant such as Alnus sp. Only some Frankia strains are able to sporulate in-planta, as spores can be present in (Sp+) or absent from (Sp–) the vegetal cells of the root nodule. It is to our knowledge a unique case of endophytic sporulation. However, the description and the ecological interpretation of this original life-history trait (LHT) were scarce. Our contribution to the study of the in-planta sporulation of Alnus-infective Frankia sp. combines theoretical, descriptive and experimental approaches to precise (i) the relative effect of the bacterial strain, the host-plant species and the pedoclimatic conditions on this LHT, (ii) the effect of the of the environmental variability on the distribution, diversity and selection of the trait, and (iii) the associated costs and benefits for the two symbiotic partners. We demonstrated for the first time that the in-planta sporulation is a LHT (i) specific to some Frankia lineages, (ii) major to understand their evolutionary history and (iii) significantly correlated to particular genetic features. We also shown that the occurrence of the trait varies according to the environment We also proposed a model of the evolution of the trait taking its fitness into account. We bring all the previous considerations and results to discuss the inplanta sporulation trait within a continuum of symbiotic strategies and more generally to discuss the evolutionary ecology of plant-microbe symbioses
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Dziminski, Martin A. "The evolution of variable offspring provisioning." University of Western Australia, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0134.
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Most theoretical models predict an optimal offspring size that maximises parental fitness. Variation in the quality of the offspring environment can result in multiple offspring size optima and therefore variation of offspring provisioning can evolve. Variation in offspring provisioning is common and found across a variety of taxa. It can be defined as between populations, explained by optimality models, or between and within individuals, neither so easily explained by optimality models. My research focused on the evolution of variable offspring provisioning by testing theoretical models relating to variation in offspring provisioning between and within individuals. Using comparative methods, I found a positive relationship between intraclutch variation in offspring provisioning and variation in the quality of the offspring environment in a suite of pond breeding frogs. This positive relationship provided evidence that patterns of variable offspring provisioning are related to the offspring environment. This study also identified a species (Crinia georgiana) with high variation in offspring provisioning on which to focus further investigations. High variation in offspring provisioning occured between and within individuals of this species independent of female phenotype and a trade-off in offspring size and number existed. In laboratory studies, increased yolk per offspring led to increased fitness per offspring. Parental fitness calculations revealed that in high quality conditions production of small more numerous offspring resulted in higher parental fitness, but in lower quality conditions the production of large offspring resulted in the highest parental fitness. This was confirmed in field experiments under natural conditions using molecular markers to trace offspring to clutches of known provisioning, allowing me to measure exact parental fitness. The strategy of high variation in offspring size within clutches can be of benefit when the future of the offspring environment is not known to the parents: as a form of bet-hedging. Further study of the offspring environment revealed that conditions such as density dependent fitness loss, spatial variation in habitat quality, and non-random offspring dispersal, can combine to create the conditions predicted by theoretical models to maintain a strategy of variable offspring provisioning in the population. My research provides a comprehensive empirical test of the theory of variable offspring provisioning
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Dubravcic, Darja. "Quantitative evolutionary analysis of the life cycle of social amoebae." Phd thesis, Université René Descartes - Paris V, 2013. http://tel.archives-ouvertes.fr/tel-00914467.
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Social amoebae are eukaryotic organisms that inhabit soil of almost every climate zone. They are remarkable for their switch from unicellularity to multicellularity as an adaptation to starvation. When starved, millions of single cells aggregate and form a multicellular fruiting body, which contains reproductive spore cells and dead stalk cells, which help in spore dispersion. This costly behavior made social amoebae a model system for addressing major questions of the evolution of cooperation and multicellularity. In this study we look at three different aspects of social amoebae behavior; aggregation, non-aggregation and competition, and ask how they contribute to our understanding of cooperation in social amoebae and microbial systems in general.We explored the known but neglected observation that, upon starvation, not all cells aggregate and engage in multicellular development. We describe phenotypically and genetically non-aggregating cell proportion in D. discoideum species. Both aggregating and non-aggregating strategy are costly or beneficial depending on duration of starvation. With our computational model we propose that partitioning the population into unicellular and multicellular states is adaptive in fluctuating environments with unpredicted duration of starvation periods. Social amoebae may therefore lie at the intersection of cooperation and bet-hedging. In the second part, we provide a new framework for addressing the contrasting observations of high genetic diversity in natural populations of social amoebae and experimentally suggested low diversity-high relatedness required for cooperation. We propose that complex life cycle of social amoebae provides multiple competition points that can possibly play an important role in maintaining diversity and cooperation. We explore this experimentally and computationally by looking at competition over the whole life cycle between 6 natural isolates of D. discoideum. Our simulation model indicates that competition at different stages of the life cycle can lead to exclusion of "social winners". Though we failed to explain strain coexistence. Although preliminary, our results emphasize the importance of integrating species ecology in cooperative studies.Finally, we focus on a new aggregation dynamics in P. pallidum species observed in our lab. Aggregation is a population level process during which population gets divided into numerous subpopulations/aggregates that face selection independently. Such population partitioning can have strong evolutionary consequences on cooperation that have not yet been explored experimentally. We describe the population dynamics qualitatively and propose several quantitative measurements of population partitioning into aggregates. Our preliminary results suggest that there is a preference for aggregates of certain size, but there is no spatial organization of aggregates.
Books on the topic "Beta hedging"
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Bahri, Saiful Sufar. The hedging power of beta in the UK stock market. Loughborough: Department of Economics, Loughborough University, 1997.
Find full textBook chapters on the topic "Beta hedging"
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"Hedging Bets." In Stages of Capital, 143–98. Duke University Press, 2009. http://dx.doi.org/10.1215/9780822392477-005.
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"Hedging Bets:." In Strategic Instincts, 115–44. Princeton University Press, 2020. http://dx.doi.org/10.2307/j.ctvz0h8t8.9.
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"Hedging Bets:." In Stages of Capital, 143–98. Duke University Press, 2009. http://dx.doi.org/10.2307/j.ctv125jt3q.8.
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Johnson, Dominic D. P. "Hedging Bets." In Strategic Instincts, 115–44. Princeton University Press, 2020. http://dx.doi.org/10.23943/princeton/9780691137452.003.0006.
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This chapter examines the strategic advantages of the fundamental attribution error (FAE). It talks about people that tend to attribute the behavior of other actors to intentional action but behavior of their own as dictated by circumstances or “situational constraints.” It also points out how situational constraints are though to be an important reason why nations fail to cooperate, descend into arms races, escalate conflicts, and ultimately end up at war. The chapter explains the perception of FAE as a threatening behavior that is intentional, such as the buildup of armies and armaments by European states prior to 1914 that was widely considered a menace to security. It explores the adaptive features, such as its aid in the detection of threats, preparations for war, and the formation of alliances.
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Whitney, Sarah E. "Hedging Her Bets." In Splattered Ink, 138–64. University of Illinois Press, 2016. http://dx.doi.org/10.5406/illinois/9780252040467.003.0006.
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Denison, R. Ford. "Diversity, Bet-hedging, and Selection among Ideas." In Darwinian Agriculture. Princeton University Press, 2012. http://dx.doi.org/10.23943/princeton/9780691139500.003.0012.
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This chapter summarizes the book's main conclusions and cautions against exclusive reliance on any single approach. The book's central thesis is that nature's wisdom is found primarily in competitively tested individual adaptations, in wild species and sometimes still in cultivated ones, rather than in the overall structure of natural ecosystems. It notes how some biotechnology advocates underestimate the perfection of existing individual adaptations and suggests that most near-term opportunities for genetic improvement of crops or livestock will involve tradeoffs that had constrained natural selection in the past. The chapter considers two basic approaches to the problem of varying environments: phenotypic plasticity and bet-hedging. It also discusses bet-hedging in food production, the bet-hedging benefits of organic farming and animal agriculture, and the use of diversity for bet-hedging in agricultural research. Finally, it describes traditional agricultural sciences that have been more receptive to input from evolutionary biology than biotechnology has.
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"4. Hedging Their Bets." In Parkour and the City, 94–127. Rutgers University Press, 2019. http://dx.doi.org/10.36019/9780813571980-006.
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Denison, R. Ford. "Darwinian Agriculture’s Three Core Principles." In Darwinian Agriculture. Princeton University Press, 2012. http://dx.doi.org/10.23943/princeton/9780691139500.003.0004.
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This chapter introduces the three core principles of Darwinian agriculture. First, natural selection is fast enough, and has been improving plants and animals for long enough, that it has left few simple, tradeoff-free opportunities for further improvement. Therefore, implicit or explicit acceptance of tradeoffs has been and will be key to crop genetic improvement, through biotechnology or traditional plant breeding methods. Second, competitive testing of individual adaptations by natural selection is more rigorous than nature's testing of natural ecosystems merely by endurance. Although testing by endurance shows sustainability, there may still be considerable room for improvement. Third, we should hedge our bets against future uncertainty with a greater variety of crops and of research approaches. The chapter argues that this bet-hedging will require allocating some land and other resources to crops and research programs that seem less promising today but may outperform today's winners if conditions change.
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"1.3: Hedging Our Bets: The Utility of Ecological Integrity." In Handbook of Ecosystem Theories and Management, 509–30. CRC Press, 2000. http://dx.doi.org/10.1201/9781482278606-36.
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Schotter, Elizabeth R. "Reading Ahead by Hedging Our Bets on Seeing the Future." In Psychology of Learning and Motivation, 263–98. Elsevier, 2018. http://dx.doi.org/10.1016/bs.plm.2018.08.011.
Full textConference papers on the topic "Beta hedging"
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Park, Andrew J., Richard Frank, Alexander Mikhaylov, and Myf Thomson. "Hackers Hedging Bets: A Cross-Community Analysis of Three Online Hacking Forums." In 2018 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM). IEEE, 2018. http://dx.doi.org/10.1109/asonam.2018.8508613.
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Jia Deng, J. Krause, A. C. Berg, and Li Fei-Fei. "Hedging your bets: Optimizing accuracy-specificity trade-offs in large scale visual recognition." In 2012 IEEE Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2012. http://dx.doi.org/10.1109/cvpr.2012.6248086.
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Ogura, Masaki, Masashi Wakaiki, and Victor M. Preciado. "Dynamic analysis of bet-hedging strategies as a protection mechanism against environmental fluctuations." In 2016 IEEE 55th Conference on Decision and Control (CDC). IEEE, 2016. http://dx.doi.org/10.1109/cdc.2016.7798903.
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