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| Registros recuperados: 42 | |
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| Hurley, Terrance M.; Babcock, Bruce A.; Hellmich, Richard L.. |
| Genetically engineered crops offer farmers a new option for controlling pests. The high efficacy of these pesticidal crops, combined with the potential for widespread adoption, has raised concerns that pest resistance may prematurely diminish their value. In response to these concerns, the Environmental Protection Agency requires resistance management plans. Current resistance management plans rely on a high-dose refuge strategy. This analysis extends the current framework for evaluating high-dose refuge strategies to include a measure of agricultural productivity and conventional pesticide use. The economic tradeoff relative to agricultural productivity, conventional pesticide use, and pest resistance is assessed when Bt corn is planted to control... |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 2001 |
URL: http://purl.umn.edu/31156 |
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| Yu, Li; Hurley, Terrance M.; Kliebenstein, James B.; Orazem, Peter F.. |
| A long-standing puzzle in labor economics has been the positive relationship between wages and firm size. Even after controlling for worker's observed characteristics such as education, work experience, gender, and geographic location, a significant firm size wage effect averaging 15 percent remains. This paper investigates whether the size-wage premium on hog farms persists over time and whether the magnitude is growing or shrinking. The paper pays particular attention to the matching process by which workers are allocated to farms of different size and technology use, and whether the matching process may explain differences in wages across farms. The study relies on four surveys of employees on hog farms collected in 1990, 1995, 2000, and 2005. The... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agribusiness; Livestock Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/9991 |
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| Malzer, Gary L.; Hurley, Terrance M.; Kilian, Bernard. |
| Confirming the precision agriculture hypothesis for variable rate nitrogen applications (VRA) is challenging. To confront this challenge, researchers have used increasingly sophisticated statistical models to estimate and compare site-specific crop response functions (SSCRFs). While progress has been made, it has been hampered by the lack of a conceptual framework to guide the development of appropriate statistical models. This paper provides such a framework and demonstrates its utility by developing a heteroscedastic, fixed and random effects, geostatistical model to test if VRA can increase nitrogen returns. The novelty of the model is the inclusion of site, spatial, treatment, and treatment strip heteroscedasticity and correlation. Applied to data... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Crop Production/Industries. |
| Ano: 2004 |
URL: http://purl.umn.edu/14111 |
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| Yu, Li; Hurley, Terrance M.; Kliebenstein, James B.; Orazem, Peter F.. |
| Economists have long puzzled over the fact that large firms pay higher wages than small firms, even after controlling for worker's observed productive characteristics. One possible explanation has been that firm size is correlated with unobserved productive attributes which confound firm size with other productive characteristics. This study investigates the size-wage premium in the context of firms competing within a single market for a relatively homogeneous product: hogs. We pay particular attention to the matching process by which workers are linked to farms of different size and technology use, and whether the matching process may explain differences in wages across farms. The study relies on four surveys of employees on hog farms collected in 1990,... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agribusiness; Labor and Human Capital; Livestock Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/6138 |
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| Hurley, Terrance M.; Babcock, Bruce A.; Hellmich, Richard L.. |
| Biologists now engineer transgenic crop varieties that express proteins that are toxic to a variety of common agricultural pests. These transgenic crops offer farmers a new tool for effectively managing pests that reduce yields and increase production costs. However, the concern over pest resistance to these toxins has prompted the EPA to require resistance management plans. Seed companies have focused on a high-does refuge plan where farmers are required to plant a constant proportion of cropland in refuge in order to maintain a susceptible pest population. Currently, entomologists recommend 20 to 40% refuge. This paper develops an economic model of pest management with pest resistance to estimate the constant proportion of refuge that maximizes farm... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 1997 |
URL: http://purl.umn.edu/18632 |
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| Hurley, Terrance M.; Kliebenstein, James B.; Orazem, Peter F.. |
| The rapid expansion of large-scale pork production has been accompanied by increasing concerns regarding potential detrimental consequences of environmental hazards on the health of producers. This study makes use of health indicators obtained from attendees at the World Pork Expo between 1991 and 1995 to evaluate the impact of pork production generally and of confinement production, specifically, on producer health. The analysis expands existing studies because the larger number of participants allows for detailed analysis, both nonfarmers and non-pork farmers are used as controls, both objective as well as self-reported health measures are considered, and personal characteristics such as height, weight, age, gender, smoking habits, and years of exposure... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Labor and Human Capital; Livestock Production/Industries. |
| Ano: 1996 |
URL: http://purl.umn.edu/18278 |
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| Hurley, Terrance M.. |
| Studies on the optimal use of pesticides, their disposal, and effects are presented. Papers include: Financing the Disposal of Unwanted Agricultural Pesticides, Lewell F. Gunter and Terence Centner, University of Georgia. Determinants of Pesticide Registration for Food Crops, Claude Courbois, North Carolina State University and International Food Policy Research Institute. A New Measure of Integrated Pest Management - Weed IPM by Corn Producers, Jorge Fernandez-Cornejo and Sharon Jans, USDA/ERS. The Environmental Effects of Adopting IPM Techniques: The Case of Peach Producers,Jennifer Ferraioli and Jorge Fernandez-Cornejo, USDA/ERS. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 1998 |
URL: http://purl.umn.edu/21009 |
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| Hurley, Terrance M.; Malzer, Gary L.; Kilian, Bernard. |
| Confirming the precision agriculture hypothesis for variable rate nitrogen applications (VRA) has proven challenging. To confront this challenge, researchers have begun to use increasingly sophisticated statistical models to estimate and compare site-specific crop response functions. While progress has been made, we believe it has been hampered by the lack of a clear conceptual framework to guide and motivate the development of appropriate models and methods. The purpose of this paper was to provide such a framework, while demonstrating its utility. The framework was used to develop a heteroscedastic, fixed and random effects, geostatistical model to test the potential for VRA to increase nitrogen returns. The model was implemented with data collected... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/21950 |
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| Registros recuperados: 42 | |
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