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| Registros recuperados: 50 | |
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| McBride, William D.; Key, Nigel D.; Mathews, Kenneth H., Jr.. |
| Antimicrobial drugs are fed to hogs at sub-therapeutic levels to prevent disease and promote growth. However, there is concern that the presence of antimicrobial drugs in hog feed is a factor promoting the development of antimicrobial drug-resistant bacteria. This study uses a sample-selection model to examine the impact that use has on the productivity of U.S. hog operations. The analysis did not find a relationship between productivity and sub-therapeutic antibiotics fed during finishing, but productivity was significantly improved when fed to nursery pigs. Restrictions on feeding antimicrobial drugs during the nursery phase would likely impose significant economic costs on U.S. hog producers. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Livestock Production/Industries. |
| Ano: 2006 |
URL: http://purl.umn.edu/21148 |
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| Roberts, Michael J.; Key, Nigel D.. |
| Over the last twenty five years commodity crop farms have steadily declined in number and grown in average size, and production has shifted to larger operations. During the same period, the share of agricultural payments going to large farms has increased, in large part because payments are tied to actual or historical crop production. This study evaluates whether payments from federal farm programs may have contributed to the concentration of farmland. Using zip code-level data constructed from the micro files of the 1987-2002 Agriculture Censuses the study estimates the association between government payments per acre and subsequent growth in weighted median farmland area. A semi-parametric generalized additive model controls for location and initial... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural and Food Policy. |
| Ano: 2006 |
URL: http://purl.umn.edu/21097 |
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| Key, Nigel D.; Roberts, Michael J.; O'Donoghue, Erik J.. |
| Previous research has found that on-farm income variability helps determine off-farm labor supply. However, unobserved heterogeneity of farms or regions may have biased earlier results. In this study, we use an exogenous increase in Federal crop insurance subsidies as a natural experiment to identify the importance of risk in off-farm labor supply. The subsidy increases induced greater participation in crop insurance programs and thereby reduced farmers' financial risks. By merging county-level crop insurance participation data with farm-level Agricultural Census data from 1992 and 1997 we can compare the off-farm labor decisions of individual farms before and after the subsidy and thereby control for unobserved heterogeneity. Unlike previous studies, we... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Labor and Human Capital. |
| Ano: 2003 |
URL: http://purl.umn.edu/22175 |
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| Key, Nigel D.. |
| A farmer's decision to contract or produce independently depends on the distribution of income under both arrangements, and on attributes associated with both business arrangements. Risk-averse farmers should be willing to pay a risk premium for the reduction in price risk provided by a contract. Farmers with a preference for "autonomy" should be willing to pay a premium for certain attributes associated with independent production, such as the right to make management decisions and own the commodity they produce. The benefits to growers from contracting (such as risk reduction) may be over-estimated if the non-pecuniary benefits enjoyed by independent producers are not accounted for. This study uses national survey data to estimate the risk premium, the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural contracts; Autonomy; Nonpecuniary benefits; Risk; Farm Management. |
| Ano: 2002 |
URL: http://purl.umn.edu/19688 |
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| Key, Nigel D.; McBride, William D.. |
| Estimating how the use of production contracts affects farm productivity is difficult when unobservable factors are correlated with both the decision to contract and productivity. To account for potential selection bias, this study uses the local availability of production contracts as an instrument for whether a farm uses a contract in order to estimate the impact of contract use on total factor productivity. Results indicate that use of a production contract is associated with a large increase in productivity for feeder-to-finish hog farms in the United States. The instrumental variable method makes it credible to assert that the observed association is a causal relationship rather than simply a correlation. |
| Tipo: Journal Article |
Palavras-chave: Productivity; Production contracts; Instrumental variables; Sample selection; Productivity Analysis. |
| Ano: 2008 |
URL: http://purl.umn.edu/45659 |
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| Key, Nigel D.; MacDonald, James M.. |
| The exercise of monopsony power by broiler processing firms is plausible because production occurs within localized complexes, which limits the number of integrators with whom growers can contract. In addition, growers face distinct hold-up risks as broiler production requires a substantial investment in specific assets and most production contracts do not involve long-term purchasing commitments by integrators. This paper provides an initial exploration of the links between the local concentration of broiler integrators and grower compensation under production contracts using data from the 2006 broiler version of USDA’s Agricultural Resource Management Survey. Results of this preliminary study, which accounts for characteristics of the operation and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Poultry; Broilers; Market power; Monopsony; Production contracts; Livestock Production/Industries; Marketing. |
| Ano: 2008 |
URL: http://purl.umn.edu/6073 |
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| Key, Nigel D.; Lubowski, Ruben N.; Roberts, Michael J.. |
| This study makes use of farm-level data from the Agricultural Census to evaluate the effects of the 1996 Federal Agriculture Improvement and Reform (FAIR) Act, which intended to "decouple" commodity payments from production decisions. Prior to this Act, agricultural support payments were linked to production decisions via prices and a complex set of restrictions that acted to control the supply of agricultural commodities. We compare farm-level 1992-to-1997 changes in commodity crop plantings of farms that participated in government programs with farms that did not participate. We find that the growth rate of program-crop acreage of non-participants was 19 percentage points below that of participants. This estimated difference remains unchanged after... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural and Food Policy. |
| Ano: 2004 |
URL: http://purl.umn.edu/20128 |
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| McBride, William D.; Key, Nigel D.; Mathews, Kenneth H., Jr.. |
| Antimicrobial drugs are fed to hogs at sub-therapeutic levels to prevent disease and promote growth. However, there is concern that the presence of antimicrobial drugs in hog feed is a factor promoting the development of antimicrobial drug-resistant bacteria. This study describes the extent to which antibiotics are used in hog production and how this changed between 2004 and 2009. This study also uses a sample-selection model to examine the impact that use has on the productivity of U.S. hog operations. Using hog producer data from 2004, the analysis did not find a relationship between productivity and sub-therapeutic antibiotics fed during finishing, but productivity was significantly improved when fed to nursery pigs. These results are being evaluated... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Antibiotics; Hogs; Sample selection; Farm Management; Production Economics. |
| Ano: 2011 |
URL: http://purl.umn.edu/103232 |
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| Roberts, Michael J.; O'Donoghue, Erik J.; Key, Nigel D.. |
| We use administrative data from the Federal crop insurance program to examine how yield distributions change as farmers cycle into and out of the program. We are able to do this by linking many years of crop insurance data by individual farm conditioning observed yields on the particular county and year in which they are observed. Armed with millions of observations, we examine many states and five major crops: corn, soybeans, wheat, rice and cotton. We find little evidence that yield distributions are affected by insurance. An exception is rice in Arkansas, where insurance shifts the distribution markedly downward. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries; Risk and Uncertainty. |
| Ano: 2007 |
URL: http://purl.umn.edu/9828 |
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| Roberts, Michael J.; Key, Nigel D.. |
| Farm-level Census data and county-level income shock data reveal that past unexpected income shocks affect the rate of change in average farm size. Average farm size increases more quickly in counties experiencing negative income shocks as compared to counties experiencing positive income shocks. This result cannot be explained by perfect-market models, which predict farm size should adjust according to changes in the relative prices of labor and capital. We posit a model wherein cash flows affect liquidity, which in turn affects farm borrowing and capital costs. In the model, farms that do not face liquidity constraints benefit from negative income shocks because they reduce land values, so these farms expand while liquidity-constrained farms contract.... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm size; Farm structure; Income shocks; Liquidity constraint; Risk; Agricultural Finance; Industrial Organization. |
| Ano: 2002 |
URL: http://purl.umn.edu/19661 |
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| Registros recuperados: 50 | |
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