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| Registros recuperados: 20 | |
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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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| 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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| Mathews, Kenneth H., Jr.. |
| Antimicrobial drugs are fed to animals at low levels to treat diseases, to promote growth, and to increase feed efficiency. Incorporating low levels of antimicrobial drugs in livestock feeds has been shown to be a factor stimulating the development of antimicrobial drug resistant bacteria in livestock. Since many of the drugs used to treat livestock are the same as or are related to drugs used in human health care, there is concern that resistant organisms may pass from animals to humans through the handling of animals or food derived from animals. The movement of pathogens from animals to humans, and vice versa, has been documented, but the extent to which it has occurred or could occur is unknown. Although it is estimated that as little as 10 percent of... |
| Tipo: Report |
Palavras-chave: Antimicrobial drugs; Pathogens; Growth promotion; Feed efficiency; Therapeutic drug use; Subtherapeutic drug use; Subclinical; Livestock Production/Industries. |
| Ano: 2001 |
URL: http://purl.umn.edu/33695 |
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| Paarlberg, Philip L.; Hillberg, Ann; Lee, John G.; Mathews, Kenneth H., Jr.. |
| This report presents a modeling framework in which epidemiological model results are integrated with an economic model of the U.S. agricultural sector to enable estimation of the economic impacts of outbreaks of foreign-source livestock diseases. To demonstrate the model, the study assessed results of a hypothetical outbreak of foot-and-mouth disease (FMD). The modeling framework includes effects of the FMD episode on all major agricultural products and assesses these effects on aggregate supply, demand, and trade over 16 quarters. Model results show a potential for large trade-related losses for beef, beef cattle, hogs, and pork, though relatively few animals are destroyed. The swine and pork sectors recover shortly after assumed export restrictions end,... |
| Tipo: Report |
Palavras-chave: Animal disease; Epidemiology; Foot and mouth disease (FMD); Sector model; Trade; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; International Development; International Relations/Trade; Livestock Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/56453 |
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| Arnade, Carlos Anthony; Mathews, Kenneth H., Jr.; Jones, Keithly G.. |
| Derived demand relationships among four weight categories of feeder cattle entering Texas feedlots and feed were examined using a Generalized McFadden dual cost function specified as an error correction model. Relationships among own- and cross-price elasticities provide evidence for at least two cattle feeding enterprises, feeding lightweight feeder cattle (calves) and feeding heavier cattle. These results indicate systematic differences in demand relationships among the different weight classes, providing explanation and insight into mixed results from earlier studies. Seasonality differed across weight categories, providing additional support for multiple cattle feeding enterprises. A third step was added to the Engle-Granger two-step estimation... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 2005 |
URL: http://purl.umn.edu/19454 |
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| McBride, William D.; Mathews, Kenneth H., Jr.. |
| Beef cow-calf production in the United States is widespread, occurring in every State. Nearly 765,000 farms, about 35 percent of the 2.2 million farms in the United States, had a beef cow inventory in 2007. Most of these were small, part-time operations. About a third of farms that raise beef animals had a beef cow inventory of less than 10 cows, more than half had fewer than 20 cows, and nearly 80 percent had fewer than 50 cows. In this study, ERS uses data from USDA’s 2008 Agricultural Resource Management Survey for U.S. beef cow-calf operations to examine the structure, costs, and characteristics of beef cow-calf producers. Many small operations are “rural residence farms” that specialize in beef cow-calf production, but their income from off-farm... |
| Tipo: Report |
Palavras-chave: Beef cow-calf production; Farm income; Animal traceability; Agricultural Resource Management Survey (ARMS); National Animal Identification System (NAIS); Agribusiness; Agricultural and Food Policy; Farm Management; Livestock Production/Industries. |
| Ano: 2011 |
URL: http://purl.umn.edu/102764 |
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| Mathews, Kenneth H., Jr.; Hahn, William F.; Nelson, Kenneth E.; Duewer, Lawrence A.; Gustafson, Ronald A.. |
| In early 1996, the peak in the current cycle of cattle inventories coincided with a long list of negative factors--negative returns at the farm and feedlot, record-high feed grain prices, a severe drought in 1995-96, widening farm-retail price spreads, a low farmers' share of the consumers' Choice beef dollar, and reports of high profits for beefpackers. This confluence created an atmosphere in which some producers and members of Congress questioned whether the cattle industry was adversely affected by high packer concentration and market power. In this report, we examine the cattle cycle of the 1990's to determine if there are differences from previous cattle cycles and, if so, how and why they are different. We found that values for many variables at the... |
| Tipo: Report |
Palavras-chave: Cattle cycles; Price spreads; Packer concentration; Cattle slaughter; Steer and heifer slaughter; Cow slaughter; Livestock Production/Industries. |
| Ano: 1999 |
URL: http://purl.umn.edu/33583 |
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| Registros recuperados: 20 | |
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