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| Registros recuperados: 71 | |
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| Wolf, Christopher A.; Hadrich, Joleen C.; Vandehaar, M.J.. |
| Accelerated prepubertal growth rates can lower heifer raising costs but may put heifers at risk for impaired mammary development and have been found to be detrimental decreased to milk production in the first lactation. The tradeoff between heifer raising costs and milk production loss is examined in a capital budgeting model. Monthly annuity net present value of a heifer investment through the first lactation is assessed for heifers calving at 20, 22, 24, 26 and 28 months of age. A 24 mo AFC base case strategy with 9009.5 kg subsequent first lactation milk yields $7.34 in returns per month. Accelerated growth resulted in higher returns ($12.77/mo for 20 mo AFC; $9.86/mo for 22 mo AFC) when milk production is not affected as total raising costs decline... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Heifer growth; Economics; Investment; Livestock Production/Industries. |
| Ano: 2006 |
URL: http://purl.umn.edu/7429 |
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| Wolf, Christopher A.. |
| Milk sales are the largest source of revenue on dairy farms. Reproduction is necessary to generate a new lactation. However, a pregnancy also dictates when the previous lactation must end so that the cow can retain sufficient condition into her new lactation. Pregnancy rate and estrus detection rate determine reproductive success. From an economics point of view, we talk about calving interval or days open so that a dollar value can be easily associated with the reproductive management program. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Livestock Production/Industries. |
| Ano: 1999 |
URL: http://purl.umn.edu/11590 |
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| Wittenberg, Eric; Wolf, Christopher A.. |
| This report summarizes the financial and production records of 9 dairy grazing farms across Michigan. Intensive grazing implies providing as much of the needed roughages from pasture. These 9 farms indicated that they grazed dairy cows at least three months of the year and that grazing provided more than 30 percent of the forage consumed during the year. To be included, the farms must have produced at least 50 percent of gross cash farm income from milk and dairy animal sales. The farms in this report were located throughout Michigan. The records came from Michigan State University�s TelFarm/MicroTel project, the Farm Credit Service system, or by AgriSolutions in Michigan. The values were pooled into averages for reporting purposes. Farm records checked... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Livestock Production/Industries. |
| Ano: 2004 |
URL: http://purl.umn.edu/11823 |
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| Oehmke, James F.; Wolf, Christopher A.; Weatherspoon, Dave D.; Naseem, Anwar; Maredia, Mywish K.; Raper, Kellie Curry; Hightower, Amie L.. |
| Several characteristics of biotech industry structure follow cyclical patterns. Mergers and acquisitions activity shows cyclical behavior, with peaks from 1988-92 and 1996-97 and a valley from 1993-95. The ratio of large-firm to small-firm field trials, and the Herfindahl-Hirshmann concentration index, move pro-cyclically with M&A activity. This paper develops a formal, dynamic, neo-Schumpeterian model of endogenous R&D and innovation. The model generalizes and extends the literature on biotech industry concentration. For specified parameter values, the out-of-steady-state dynamics are examined, and shown to generate model behavior which is consistent with empirical descriptions of biotech concentration and R&D-activity cycles. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 1999 |
URL: http://purl.umn.edu/11792 |
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| Wittenberg, Eric; Wolf, Christopher A.. |
| This report summarizes the financial and production records of 139 dairy farms from throughout Michigan in 2006. To be included, the farms must have produced at least 50 percent of gross cash farm income from milk and dairy animal sales. The records came from Michigan State University’s TelFarm project and the Farm Credit Service system in Michigan. The values were pooled into averages for reporting purposes. The farms are larger than would be the average of all dairy farms in Michigan. While considerable variation in the data exists, average values are reported in the summary tables and discussion that follows. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agribusiness; Livestock Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/7033 |
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| Registros recuperados: 71 | |
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