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Registros recuperados: 78
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Innovation behaviour at farm level: Selection and identification AgEcon
Sauer, Johannes; Zilberman, David.
Using a squential logit model and a mixed-effects logistic regression approach this empirical study investigates factors for the adoption of automatic milking technology (AMS) at the farm level accounting for problems of sequential sample selection and behaviour identification. The results suggest the importance of the farmer’s risk perception, significant effects of peer-group behaviour, and a positive impact of previous innovation experiences.
Tipo: Conference Paper or Presentation Palavras-chave: Squential logit model; Automatic milking technology (AMS); Livestock Production/Industries; Research Methods/ Statistical Methods; Risk and Uncertainty.
Ano: 2009 URL: http://purl.umn.edu/53276
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Innovation behaviour at micro level - selection and identification AgEcon
Sauer, Johannes; Zilberman, David.
Using a sequential logit model and a mixed-effects logistic regression approach this empirical study investigates factors for the adoption of automatic milking technology (AMS) at the farm level accounting for problems of sequential sample selection and behaviour identification. The results suggest the importance of the farmer’s risk perception, significant effects of peer-group behaviour, and a positive impact of previous innovation experiences.
Tipo: Working Paper Palavras-chave: Farmers; Research; Dairy industry; Behavior modification; Farm Management; Livestock Production/Industries.
Ano: 2009 URL: http://purl.umn.edu/120636
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Invasive Species Management: Importers, Border Enforcement, and Risk AgEcon
Ameden, Holly A.; Cash, Sean B.; Zilberman, David.
Invasive species are a negative externality associated with imported goods. Policies aimed at excluding pests associated with imports include pre-shipment treatment requirements, varied inspection schemes, treatment at the border, penalties, and import bans or restrictions. Existing policies are based on the reasoning that increased enforcement effort will result in higher detection levels, or more specifically, that increased inspection will result in a higher number of interceptions and in turn, higher compliance. In addition to a deterrence effect, however, under which importers respond to increased enforcement with increased due care with respect to pest control, importers may respond in ways that regulators do not intend. For example, importers may...
Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/9946
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IRRIGATION PRODUCTION FUNCTIONS WITH WATER-CAPITAL SUBSTITUTION AgEcon
Shani, Uri; Tsur, Yacov; Zemel, Amos; Zilberman, David.
The dynamics of biomass growth implies that the yield of irrigated crops depends, in addition to the total amount of water applied, on irrigation scheduling during the growing period. Advanced irrigation technologies relax constraints on irrigation rates and timing, allowing to better adjust irrigation scheduling to the varying needs of the plants along the growing period. Irrigation production functions, then, should include capital (or expenditures on irrigation equipment) in addition to aggregate water. We derive such functions and study their water-capital substitution properties. Implications for water demand and adoption of irrigation technologies are investigated. An empirical application confirms these properties.
Tipo: Working or Discussion Paper Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/7180
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IS EQUITY A CONSTRAINT? APPLICATIONS TO BLOCK RATE AND OTHER PRICING SCHEMES WITH HETEROGENEOUS USERS AgEcon
Schoengold, Karina; Zilberman, David.
In this paper, we model the trade-off between equity and efficiency in a market for a resource when users of that resource are heterogeneous. We develop the analytical model, and show that under certain circumstances efficiency can be achieved in a manner that also reduces inequality. We also illustrate these results through the use of simulation methods.
Tipo: Conference Paper or Presentation Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2004 URL: http://purl.umn.edu/19945
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MEASURING THE GAINS FROM MANAGEMENT OF SPATIALLY HETEROGENEOUS RESOURCES: THE CASE OF GROUNDWATER AgEcon
Brozovic, Nicholas; Sunding, David L.; Zilberman, David.
We develop a model for the dynamic management of spatially heterogeneous resources with multiple users. We apply our model to the case of groundwater and show that – contrary to the results of existing studies – even when externalities are highly concentrated in space, significant efficiency gains are possible over competitive outcomes.
Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/20240
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Nonlinearities in the US corn-ethanol-oil price system AgEcon
Serra, Teresa; Zilberman, David; Gil, Jose Maria; Goodwin, Barry K..
We use a smooth transition vector error correction model to assess price relationships within the US ethanol industry. Daily ethanol, corn and oil futures prices observed from mid-2005 to mid-2007 are used in the analysis. Results indicate the existence of an equilibrium relationship between ethanol, corn and oil prices. However, only ethanol prices adjust, in a non-linear fashion, to deviations from this long-run parity. Generalized impulse response functions indicate that a shock to both oil and corn prices causes a change in ethanol prices of the same sign. Ethanol responses usually reach a peak after about 10 days of the initial shock and fade away within 35 days.
Tipo: Conference Paper or Presentation Palavras-chave: Biofuels; United States; Cointegration; Threshold; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/6512
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On the spatial nature of the groundwater pumping externality AgEcon
Brozovic, Nicholas; Sunding, David L.; Zilberman, David.
Most existing economic analyses of optimal groundwater management use single-cell aquifer models, which assume that an aquifer responds uniformly and instantly to groundwater pumping. This paper demonstrates how spatially explicit aquifer response equations from the water resources engineering literature may be embedded in a general economic framework. Calibration of our theoretical model to published economic studies of specific aquifers demonstrates that, by averaging basin drawdown across the entire resource, existing studies generally understate the magnitude of the groundwater pumping externality relative to spatially explicit models. For the aquifers studied, the drawdown predicted by single-cell models may be orders of magnitude less than that...
Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/21035
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Pesticide usage and the choice of pest control strategy: A switching regression analysis AgEcon
Hanemann, W. Michael; Tsur, Yacov; Zilberman, David.
Tipo: Working or Discussion Paper Palavras-chave: Farm Management.
Ano: 1984 URL: http://purl.umn.edu/6300
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PESTICIDE USE AND REGULATION: MAKING ECONOMIC SENSE OUT OF AN EXTERNALITY AND REGULATION NIGHTMARE AgEcon
Zilberman, David; Millock, Katti.
This article argues that the existing maze of pesticide policies reflects the multidimensionality of side effects of pesticide use that cannot be addressed by uniform policies. Pesticide policies will improve as (a) economic literacy among natural scientists and policymakers increases; (b) economic models of pesticide use and agricultural production in general better incorporate biological consideration; (c) benefit-cost criteria are introduced to determine regulations of pesticide, and (d) policies are enacted that take advantage of new information technologies and enable increased reporting of pesticide use. Moving from bans toward financial incentives and flexible policies that will allow chemical use where the benefit-cost ratios are high will improve...
Tipo: Journal Article Palavras-chave: Agricultural and Food Policy.
Ano: 1997 URL: http://purl.umn.edu/30857
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Price volatility in ethanol markets AgEcon
Serra, Teresa; Zilberman, David.
Our paper looks at how price volatility in the Brazilian ethanol industry changes over time and across markets by using a new methodological approach suggested by Seo (2007). The main advantage of Seo’s proposal over previously existing methods is that it allows to jointly estimate the cointegration relationship between the price series investigated and the multivariate GARCH process. Our results suggest that crude oil prices not only influence ethanol price levels, but also their volatility. Increased volatility in crude oil markets results in increased volatility in ethanol markets. Ethanol prices, on the other hand, influence sugar price levels and an increase in their volatility levels also impacts, though less strongly, on sugar markets.
Tipo: Conference Paper or Presentation Palavras-chave: Volatility; Ethanol; GARCH; Cointegration; Demand and Price Analysis; Resource /Energy Economics and Policy; Risk and Uncertainty; Q11; C32.
Ano: 2009 URL: http://purl.umn.edu/49188
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Price volatility in ethanol markets AgEcon
Serra, Teresa; Zilberman, David.
Our paper looks at how price volatility in the Brazilian ethanol industry changes over time and across markets. Demand and supply forces in the energy and food markets are likely to ensure that crude oil, ethanol and feedstock prices co-move in the long-run. Hence, when assessing price volatility changes and spillovers in the ethanol industry, one should also pay attention to the notion of cointegration. Until recently, the methods proposed to estimate cointegration relationships, have not explicitly considered time varying volatility in the data. Seo (2007) suggests an estimator of the cointegration vector that explicitly models conditional heteroskedasticity. More specifically, he proposes a maximum likelihood estimator that estimates the error...
Tipo: Conference Paper or Presentation Palavras-chave: Volatility; Ethanol; Cointegration; Demand and Price Analysis; Research Methods/ Statistical Methods; Q11; C32.
Ano: 2009 URL: http://purl.umn.edu/49940
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Prices versus Quantities Reconsidered AgEcon
Brozovic, Nicholas; Sunding, David L.; Zilberman, David.
In comparing second-best prices and quantities, studies assume that quantities bind with probability one. We present a more general and realistic model of second-best regulation where quantity instruments can bind with probability less than one. This additional flexibility of quantity instruments makes them much more efficient than previously realized.
Tipo: Conference Paper or Presentation Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2004 URL: http://purl.umn.edu/20257
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Principal Issues in the Evaluation of Public Research in Agriculture AgEcon
Rausser, Gordon C.; de Janvry, Alain; Schmitz, Andrew; Zilberman, David.
Tipo: Conference Paper or Presentation Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1981 URL: http://purl.umn.edu/49077
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Regulation of GHG emissions from biofuel blended energy AgEcon
Hochman, Gal; Rajagopal, Deepak; Zilberman, David.
Regulatory agencies are planning to implement policies targeted at mitigating greenhouse gas emissions (GHG)—e.g., low carbon fuel standards and carbon trading. Biofuels are viewed as a path to achieve these goals. Biofuels, however, pose challenges to regulators because their GHG emissions are site-specific (there are regional differences, as well as technical differences) and uncertain. In this article, we propose methodological improvements to existing methods that yield better estimates for biofuel GHG emissions, and reduce uncertainty. We propose to break the net emissions caused by a regulated site, such as an oil refinery, into two parts: direct and indirect emissions. Direct emissions arise both at and away from the final regulated site, but are...
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/53496
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REPLACEMENT OF PRICE SUPPORT MEASURES BY DIRECT PAYMENTS IN AGRICULTURAL POLICIES: DOES THIS BENEFIT THE ENVIRONMENT? THE EFFECTS OF THE POST-1992 CAP ON PEST CONTROL IN THE E.U. AgEcon
Serra, Teresa; Zilberman, David; Goodwin, Barry K.; Hyvonen, Keijo.
The objective of this research is to determine the contribution of recent agricultural policy reforms in the E.U. on the use of crop protection products. Specifically, we concentrate on the 1992 CAP reforms. Our theoretical model adopts the multi-output generalization of the Lichtenberg-Zilberman damage control technology model developed by Chambers and Lichtenberg. In the empirical application, farm-level data for a sample of French farms are utilized. Results suggest that price effects on the usage of crop protection products are always more elastic than the compensatory payment effects. This result indicates that a policy reform consisting of a reduction in price-support measures in favor of direct payments to farmers, such as the 1992 CAP reform,...
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural and Food Policy; Environmental Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/20043
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Revisiting the demand of agricultural insurance: The case of Spain AgEcon
Garrido, Alberto; Zilberman, David.
We use the actual insurance records of 52,300 farmers and 11 years to estimate two sets of insurance demands. We define measures of insurance's expected returns, variance and third moment, based on observed insurance data, and infer the expected returns for those farmers that have never had an indemnity. We estimate several probit models and count models for the insuring vs non-insuring strategies, in which the economic returns of insurance and its two measures of dispersion enter as explanatory variables. Results show that farmers' insurance strategies are largely explained by their actual insurance experience as captured by these three variables. Individuals with loss rations greater than 1 do not show more responsiveness that those facing more balanced...
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural insurance; Insurance demand models; Spain; Risk and Uncertainty; G22; Q12; Q14.
Ano: 2007 URL: http://purl.umn.edu/9266
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Risk, Overconfidence and Production in a Competitive Equilibrium AgEcon
Just, David R.; Cao, Ying; Zilberman, David.
Previous studies have found underestimation of risk, or overconfidence, to be pervasive. In this paper, we model overconfidence as a reduction in perceived variance. We generalize the analysis of Sandmo and examine the effects of competition on firms displaying overconfidence. Cases for both competitive equilibrium and imperfect competition are investigated. We show that overconfidence may strictly dominate rationality in a competitive market by leading risk averse producers to invest greater amounts and produce more. This leads to a higher average profit, and greater variance of profits, leaving the producer a greater probability of surviving competitive pressures. Despite the greater variance of profits, if enough producers underestimate their risk, they...
Tipo: Conference Paper or Presentation Palavras-chave: Overconfidence; Misperception; Production; Competition; Production Economics; Risk and Uncertainty.
Ano: 2009 URL: http://purl.umn.edu/49161
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STORAGE TECHNOLOGY AND THE ENVIRONMENT AgEcon
Lichtenberg, Erik; Zilberman, David.
A dynamic framework is presented for analyzing regulations affecting the use of spoilage-reducing inputs with potential negative environmental effects, such as pesticides, growth regulators, chemical preservatives, and irradiation. Such regulations change intertemporal consumption patterns as well as total output. Consumers may benefit from restrictions on storage technology, giving them a reason to support regulation even when it may not be warranted to correct environmental externalities. Static analyses do not take into account changes in intertemporal consumption, and thus may give misleading depictions of the effects of imposing new regulations. Implications of the framework for development and trade policy are discussed, as are extensions to...
Tipo: Journal Article Palavras-chave: Environmental Economics and Policy.
Ano: 2002 URL: http://purl.umn.edu/31077
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STORAGE TECHNOLOGY AND THE ENVIRONMENT AgEcon
Lichtenberg, Erik; Zilberman, David.
Tipo: Working or Discussion Paper Palavras-chave: Environmental Economics and Policy.
Ano: 2000 URL: http://purl.umn.edu/28581
Registros recuperados: 78
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