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| Registros recuperados: 39 | |
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| Nehring, Richard F.; Fernandez-Cornejo, Jorge. |
| This paper estimates returns to scale and technical efficiency of corn farms following an input distance function approach and compares the relative performance of farm operator households with and without off-farm wages and salaries. We use 1995-2003 USDA data. The input distance function results suggest that off-farm outputs and inputs can be modeled in a multi-activity framework, which materially alter performance measures in the Corn Belt. We find that off-farm income boosts scale and technical efficiency of smaller operations. We also find that the number of hours worked off-farm by the spouse contributes to a higher technical efficiency. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Management. |
| Ano: 2005 |
URL: http://purl.umn.edu/19566 |
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| Payne, Tim; Fernandez-Cornejo, Jorge; Daberkow, Stan G.. |
| The likelihood of adopting corn rootworm (CRW) Bt seed technology was analyzed using an ordered logit model. Data used to estimate the model came from USDAs 2001 Agricultural Resource Management Survey. Statistically significant variables include operator age, farm type, farm size, rootworm loss and current treatment for rootworm, off farm labor, and Bt technology for corn borer. The likelihood of adoption was not related to crop rotation, tillage system, new variant CRW region, or education. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/35983 |
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| Fernandez-Cornejo, Jorge; Li, Jiayi. |
| This paper develops an econometric model to analyze the onfarm impact of adoption of genetically engineered (GE) crops on pesticide use and yields after controlling for other factors. The model, which corrects for self-selection and simultaneity and is consistent with profit maximization, is used to estimate the relationship between Bt corn adoption and insecticide use and yields using data from a nationwide farm survey carried out in 2001. Statistically significant econometric results, controlling for other factors, show a moderate insecticide reduction and a small yield increase associated with adoption of Bt corn relative to using conventional corn varieties in 2001. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2005 |
URL: http://purl.umn.edu/19318 |
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| Nehring, Richard F.; Martin, Andrew; Fernandez-Cornejo, Jorge; Hallahan, Charles B.; Vialou, Alexandre; Wechsler, Seth James; Grube, Arthur. |
| This paper presents findings on the use of HT corn and quality-adjusted herbicide use for 12 key corn producing states using a panel data set for 1986-2008. Our preliminary findings indicate an insignificant impact of HT corn on herbicide use, conditioning or accounting for HT corn with other important drivers of corn herbicide use: HT soy, corn output price, glyphoste price, nonherbicide glyponsate price, and percentage of continuous corn and low-till corn. However, we find a positive and significant impact of HT corn on herbicide use in selected states, using regional interaction terms. We use econometric techniques to avoid spurious regression results. Other preliminary runs indicated that the results hold when running the US and regional interactions... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: HT-corn; Herbicides; Weed resistance; Glyphosate; Corn; Environmental Economics and Policy; Farm Management; Production Economics. |
| Ano: 2011 |
URL: http://purl.umn.edu/103369 |
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| Fernandez-Cornejo, Jorge; Spielman, David J.. |
| The paper presents a model developed to examine the effects of industry concentration on market power and cost efficiency in the seed industry. In addition, the paper presents preliminary measures of the relative strengths of these effects for the case of the U.S. corn seed industry over the past 3 decades. The model uses conjectural elasticities and is estimated using data collected from USDA sources. The empirical results allow us to distinguish between the market power and cost effects of concentration, and to ascertain the tradeoff between the cost efficiency and market power resulting from higher concentration in the corn seed industry. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Marketing. |
| Ano: 2002 |
URL: http://purl.umn.edu/19877 |
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| Fernandez-Cornejo, Jorge. |
| Radial and nonradial measures of technical efficiency are calculated empirically for Florida vegetable farms using DEA (data envelopment analysis) techniques. Use of the nonradial measures to calculate overuse of chemical inputs by inefficient farmers is demonstrated and the potential for reduced environmental loading of pesticides and fertilizers by improving efficiency is evaluated. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1994 |
URL: http://purl.umn.edu/31322 |
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| Registros recuperados: 39 | |
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