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Registros recuperados: 15
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A COMPARISON OF VARIOUS FRONTIER ESTIMATION METHODS UNDER DIFFERING DATA GENERATION ASSUMPTIONS AgEcon
Settlage, Daniel M.; Dixon, Bruce L.; Thomsen, Michael R..
Monte Carlo methods examine the accuracy of several production frontier approximating forms, estimators and methods to rank firms by level of predicted technical efficiency. Results show stochastic frontier methods superior to data envelopment analysis. The Cobb-Douglas approximating form is superior to the translog or generalized Leontief.
Tipo: Working or Discussion Paper Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2000 URL: http://purl.umn.edu/15773
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A Dynamic Decision Model of Technology Adoption under Uncertainty: Case of Herbicide-Resistant Rice AgEcon
Annou, Mamane Malam; Wailes, Eric J.; Thomsen, Michael R..
Herbicide-resistant (HR) rice technology is a potential tool for control of red rice in commercial rice production. Using an ex ante mathematical programming framework, this research presents an empirical analysis of HR rice technology adoption under uncertainty. The analysis accounts for stochastic germination of red rice and sheath blight to model a profit maximization problem of crop rotation among HR rice, regular rice, and soybeans. The results demonstrate that risk attitudes and technology efficiency determine adoption rates and optimal rotation patterns.
Tipo: Journal Article Palavras-chave: Biotechnology; Herbicide resistance; Mathematical programming; Profit maximization; Rice; Risk; Rotation; Technology; Adoption; Crop Production/Industries; Production Economics; Research and Development/Tech Change/Emerging Technologies; Q16; Q18; O33; C61.
Ano: 2005 URL: http://purl.umn.edu/43724
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An Optimization Model for Winery Capacity Use AgEcon
Kolympiris, Christos; Thomsen, Michael R.; Morris, Justin.
An optimization model to sequence wine flow through the production process is developed. The model is formulated as a mixed integer program and accounts for winemaking specifications, market conditions, grape availability, and tank capacity. An empirical example is provided to demonstrate results and uses of the model.
Tipo: Conference Paper or Presentation Palavras-chave: Agribusiness.
Ano: 2006 URL: http://purl.umn.edu/35263
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Consumer Attitudes toward Freshness Indicators on Perishable Food Products AgEcon
Fortin, Corey; Goodwin, Harold L., Jr.; Thomsen, Michael R..
Tipo: Journal Article Palavras-chave: Consumer/Household Economics; Food Consumption/Nutrition/Food Safety.
Ano: 2009 URL: http://purl.umn.edu/99487
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IMPLICATIONS OF RICE BIOTECHNOLOGY ON OPTIMAL RICE CROP ROTATION IN THE MISSISSIPPI RIVER DELTA REGION AgEcon
Annou, Mamane Malam; Thomsen, Michael R.; Hansen, James M.; Wailes, Eric J.; Cramer, Gail L..
Availability of new herbicide-resistant biotech rice varieties may affect traditional rice rotation practices to control red rice and enhance yields. This research evaluates the adoption of biotech rice and its effects on the current practice of crop rotation in the Mississippi River Delta region. The optimal utilization of biotech rice rotation is analyzed using a nonlinear mathematical programming model with mixed integers. Optimal rotation was found to be sensitive to the technology fee, relative prices received by farmers, the effectiveness of red rice control, and a sheath blight penalty on yield for continuous rice production.
Tipo: Working or Discussion Paper Palavras-chave: Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2001 URL: http://purl.umn.edu/15774
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LL601 Contamination and Its Impact on U.S. Rice Prices AgEcon
Li, Yarui; Wailes, Eric J.; McKenzie, Andrew M.; Thomsen, Michael R..
LL601 is a genetically modified rice variety and unapproved for commercial use. Its presence was found in commercial shipments of U.S. rice in 2006. This article explores its impact on prices and volume marketed for both the United States and Thailand, the major export competitor. The results show a significantly adverse but short duration effect on the U.S. rice market and little to no effect on the Thai rice market.
Tipo: Journal Article Palavras-chave: Cointegration; Error correction model; Event study analysis; GM contamination; LibertyLink Rice 601; U.S. rice exports; Agribusiness; Agricultural and Food Policy; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; International Relations/Trade; Research and Development/Tech Change/Emerging Technologies; C10; C32; Q11; A52.
Ano: 2010 URL: http://purl.umn.edu/57154
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Mandatory Food Recalls AgEcon
Thomsen, Michael R.; Ollinger, Michael; Crandall, Philip G.; O'Bryan, Corliss.
Food recalls are important for two reasons. One is that they mitigate harm when product failures occur. Another is that they augment incentives to invest in safety. When recalls are justified for their mitigation value, it makes sense that regulatory bodies be granted more control of the recall process in order to improve the manner in which recalls are conducted. Such is the stated intent of most proposals for changing the food recall system. However, we show that recalls can be justified by their incentive effect alone. In fact, recalls can be beneficial even when the social value of the harm they mitigate is so small as to be less than the costs of carrying them out. In these cases, it is important that proposals designed to improve the recall...
Tipo: Conference Paper or Presentation Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2008 URL: http://purl.umn.edu/6083
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PEER-EFFECTS IN OBESITY AMONG PUBLIC SCHOOL CHILDREN: A GRADE-LEVEL ANALYSIS AgEcon
Asirvatham, Jebaraj; Nayga, Rodolfo M., Jr.; Thomsen, Michael R..
We examine the role of peer effects in childhood obesity outcomes by investigating whether obesity rates among the highest graders in a public school has an effect on obesity rates among younger grades. We use a panel dataset with obesity prevalence measured at the grade level. Our data are from Arkansas public schools. Results provide evidence that changes in the obesity prevalence at the highest grade are associated with changes in obesity prevalence at younger grades. The magnitude of the peer effect depends on the type of school, and we find statistically significant peer effects in both elementary and high schools but not in middle schools. These effects are also larger in high schools than in elementary schools. We use falsification tests to provide...
Tipo: Presentation Palavras-chave: Peer-effects; Obesity; Childhood obesity; Overweight; Food Consumption/Nutrition/Food Safety; D10; D71; I10; Z13.
Ano: 2012 URL: http://purl.umn.edu/122732
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PRODUCER WELFARE CHANGES FROM MEAT AND POULTRY RECALLS AgEcon
Shiptsova, Rimma; Thomsen, Michael R.; Goodwin, Harold L., Jr..
The number and volume of meat and poultry recalls has increased substantially in recent years. This is likely due to regulatory emphasis on foodborne illness resulting in an increased frequency of testing for pathogens. We use an equilibrium-displacement model to examine the effects of recall costs on the beef, pork, and poultry industries. Results suggest that higher recall costs may have actually increased producer surplus to the broiler industry because of consumer substitution among products and that most losses resulting from recalls are accruing to the beef and pork industries.
Tipo: Journal Article Palavras-chave: Agribusiness.
Ano: 2002 URL: http://purl.umn.edu/26626
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SALES RESPONSES TO RECALLS FOR LISTERIA MONOCYTOGENES: EVIDENCE FROM BRANDED READY-TO-EAT MEATS AgEcon
Thomsen, Michael R.; Shiptsova, Rimma; Hamm, Sandra J..
Empirical models are used to measure sales losses experienced by frankfurter brands following a recall for a foodborne pathogen. Recalled brands experience a 22 to 27 percent sales decline after a recall. Brand recovery occurs within 4 to 5 months after a recall. Non-recalled brands do not experience sales losses.
Tipo: Conference Paper or Presentation Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2004 URL: http://purl.umn.edu/34602
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THE EFFECT OF E. COLI O157:H7 ON BEEF PRICES AgEcon
McKenzie, Andrew M.; Thomsen, Michael R..
Using an event study, we examine the impact of recalls for E. Coli O157:H7 on wholesale and farm-level beef prices. Prices for boneless beef, a high-volume product primarily used for processing into ground beef, react negatively to recalls, suggesting incentives exist for packing firms to adopt measures that reduce the risk of contamination. However, there is no reaction in live cattle prices and very little reaction in boxed beef prices to recall events. This suggests short-run price responses found at the wholesale level for boneless beef do not transmit back to the farm level.
Tipo: Journal Article Palavras-chave: Demand and Price Analysis.
Ano: 2001 URL: http://purl.umn.edu/31038
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The Effect of Food Scares on Risk Aversion: Implied Estimates from BSE Shocks on Cattle Futures Options (PowerPoint) AgEcon
Power, Gabriel J.; Thomsen, Michael R.; McKenzie, Andrew M.; Vedenov, Dmitry V..
PowerPoint Presentation
Tipo: Conference Paper or Presentation Palavras-chave: Risk and Uncertainty; D81.
Ano: 2009 URL: http://purl.umn.edu/48905
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The Scale Efficiency of Local Supply and Grain Marketing Cooperatives in the Upper Midwest AgEcon
Thomsen, Michael R.; Eidman, Vernon R..
Consolidation has been a trend among local cooperatives for most of the past century. Earlier studies show that these cooperatives face size-related economies and that consolidation is to be expected as cooperatives seek to improve their efficiency and competitiveness. In this article we revisit the question using data from 377 local cooperative associations in operation during the 1990s. Methods involve using nonparametric cost frontiers that enable us to distinguish the effects of scale inefficiency from other production inefficiencies. Our results suggest that many local cooperatives are at or near an efficient scale of operation.
Tipo: Journal Article Palavras-chave: Agribusiness.
Ano: 2004 URL: http://purl.umn.edu/46429
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THE SKY IS FALLING: AN EXAMINATION OF BROILER CONTRACT DESIGN AND GROWER REVENUES AgEcon
Thomsen, Michael R.; Goodwin, Harold L., Jr.; Rodriquez, Angela.
A math program is used to examine an integrators problem of assigning broiler growers into settlement pools. The integrator varies the size and frequency of flock placements by grower ability. This differentiates grower incentives by ability. Which growers receive the strongest incentives depends on amount of excess grow-out capacity.
Tipo: Conference Paper or Presentation Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2004 URL: http://purl.umn.edu/20418
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Volatility Surface and Skewness in Live Cattle Futures Price Distributions with Application to North American BSE Announcements AgEcon
Thomsen, Michael R.; McKenzie, Andrew M.; Power, Gabriel J..
Tipo: Conference Paper or Presentation Palavras-chave: Options markets; Live cattle; Volatility; Pricing density function; Financial Economics; Livestock Production/Industries; Risk and Uncertainty.
Ano: 2009 URL: http://purl.umn.edu/49354
Registros recuperados: 15
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