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| Registros recuperados: 58 | |
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| Williams, Gary W.; Shumway, C. Richard; Love, H. Alan. |
| U.S. soybean producers have been cooperatively investing in both production research and demand promotion for nearly four decades to enhance the profitability and international competitiveness of their industry. Have producers benefitted from their contributions to soybean checkoff program activities over the years? How has the return to investments in soybean production research compared to that of soybean demand promotion investments? The overall positive returns to producers over the study period resulted primarily from promotion activities. Production research contributed negatively to overall producer returns from soybean checkoff investments. |
| Tipo: Journal Article |
Palavras-chave: Agribusiness. |
| Ano: 2002 |
URL: http://purl.umn.edu/31478 |
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| Blake, Robert W.; Shumway, C. Richard; Tomaszewski, Michael A.; Rickard, Greg P.; Labore, John M.. |
| The Net Present Value Sire Summary Professional Package (NPVSS) is a microcomputer program designed for technical personnel to help dairy producers better manage investments in genetic improvement. NPVSS is written in C language, utilizes the MS-DOS operating system, and requires 256K of RAM. It is menu driven and includes parameter screens to define herd management characteristics of individual producers. Profit rankings of bulls can be generated to evaluate alternative: a) objective functions (selection policies for genetic merit in milk income and type scores), b) herd management performance factors (conception rate, calving interval, age at first calving), and c) economic factors (milk price, semen price, discount rate, planning horizon). |
| Tipo: Journal Article |
Palavras-chave: Livestock Production/Industries. |
| Ano: 1988 |
URL: http://purl.umn.edu/29708 |
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| Polson, Rudolph A.; Shumway, C. Richard. |
| Using a dual economic specification of a multiproduct technology, the structure of agricultural production was tested for five South Central states (Texas, Oklahoma, Arkansas, Mississippi, and Louisiana). A comprehensive set of output supplies and input demands comprised the estimation equations in each state. Evidence of nonjoint production in a subset of commodities was detected in four of the five states. Several commodities also satisfied sufficient conditions for consistent aggregations. However, the specific outputs satisfying each structural property varied by state. Sufficient conditions for consistent geographic aggregation across the states were not satisfied. These results provide empirical guidance and important cautions for legitimately... |
| Tipo: Journal Article |
Palavras-chave: Industrial Organization. |
| Ano: 1990 |
URL: http://purl.umn.edu/30008 |
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| Shumway, C. Richard; Chesser, Rayanne R.. |
| The impact of an ad valorem pesticide tax on cropping patterns and pesticide use was examined in the South Central Texas Crop Reporting District. Output supply equations were econometrically estimated and used in the simulation. A 25 percent tax on pesticide was estimated to have major impacts on cropping patterns and on pesticide use. Assuming other input and output prices were unaffected, the supply of one important crop would fall by more than half. Demand for some of the highly soluble and persistent pesticides, which present the greatest threat to groundwater quality, would also decrease substantially (some as much as 50 percent). |
| Tipo: Journal Article |
Palavras-chave: Crops; Dual model; Pesticides; Water quality; Supply; Crop Production/Industries. |
| Ano: 1994 |
URL: http://purl.umn.edu/15433 |
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| Asunka, Samuel; Shumway, C. Richard. |
| The presence of allocatable fixed inputs may cause truly joint technologies to appear nonjoint in the short run as well as truly nonjoint technologies to appear joint. This paper demonstrates theoretically why this can happen and then documents that it actually occurs in a significant way in aggregate U.S. agricultural production. A simple testing procedure is used that requires no data on inputs allocations. The important finding is that failure to reject true (apparent) nonjointness does not justify modeling short-run (long-run) supply independent of alternative output prices. |
| Tipo: Journal Article |
Palavras-chave: Agribusiness. |
| Ano: 1996 |
URL: http://purl.umn.edu/31397 |
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| Shumway, C. Richard; Lim, Hongil. |
| Because so much agricultural policy analysis utilizes estimates of supply and demand elasticities, it is crucial to obtain the most reliable estimates possible. Where reliability cannot be adequately assessed, the sensitivity of elasticities to equally plausible a priori specifications should at least be ascertained. In this article, the sensitivity of U.S. output supply and input demand elasticities to choice of functional form. Considerable sensitivity is found to choice of functional form. Although most frequently used, the translog is generally the outlier and is the least preferred among the alternatives. |
| Tipo: Journal Article |
Palavras-chave: Agricultural and Food Policy; Demand and Price Analysis. |
| Ano: 1993 |
URL: http://purl.umn.edu/30959 |
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| Shumway, C. Richard. |
| This essay is a critique of research evaluation research. Considerable evidence exists that agricultural research conducted during the era when projects were chosen by diffuse selection systems yielded extraordinarily high returns. It is not obvious that the formalized, quantitative, and typically centralized selection models can be expected to produce higher contemporary returns than the decentralized informal mechanisms. All ex ante evaluations are intrinsically subjective, regardless of technique used to generate the evaluation. The extreme uncertainty surrounding the nonrepetitive new-knowledge production function further limits the potential of the sophisticated selection procedures. Perhaps of greatest importance, however, are the high costs imposed... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 1981 |
URL: http://purl.umn.edu/49058 |
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| Liu, Qinghua; Shumway, C. Richard. |
| The Induced Innovation Hypothesis (IIH) is tested for Western US agriculture by means of a cointegration test. An ECM model is used to separate the short-run and long-run effects of relative price changes. A difference in the elasticities of factor substitution along the isoquant curve and the innovation possibility curve implies IIH. The estimated results showed that the induced innovation hypothesis was supported for the three regions of Washington, PNW, and the West, but not for the nation. However, while changes in relative input prices induced innovation, changes in output level or R&E investments did not. The empirical tests failed to find any significant impact of changes in the latter variables on agricultural technology in any of the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods. |
| Ano: 2003 |
URL: http://purl.umn.edu/22237 |
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| Young, Katherine D.; Shumway, C. Richard. |
| A logistic regression (logit) model was developed to examine how socioeconomic characteristics of cow-calf producers influenced their perceptions of themselves as profit maximizers. Amount of pasture acreage, percent of income earned from the cow-calf operation, and desire to increase net worth and efficiently use labor significantly increased the producer's probability of claiming to be in the business primarily to maximize profits. Some sociological reasons for owning cattle significantly reduced the probability of the producer claiming to be a profit maximizer while others significantly increased the probability. |
| Tipo: Journal Article |
Palavras-chave: Livestock Production/Industries. |
| Ano: 1991 |
URL: http://purl.umn.edu/30294 |
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| Liu, Yucan; Shumway, C. Richard. |
| The curvature properties of the indirect utility function imply a set of refutable implications in the form of comparative static results and symmetric relations for the competitive firm operating under uncertainty. These hypotheses, first derived and empirically tested under output price uncertainty by Saha and Shumway (1998), are extended in this article to the more general case of both price and quantity uncertainty and result in an important theoretical finding. Using recently developed techniques for testing unit root and cointegration in heterogeneous panels, we develop a model of U.S. agricultural production based on the time series properties of a panel of state-level data and contrast test implications with those resulting from a traditional model... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Risk and Uncertainty. |
| Ano: 2005 |
URL: http://purl.umn.edu/36307 |
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| Melhim, Almuhanad; O'Donoghue, Erik J.; Shumway, C. Richard. |
| Recent consolidation in agriculture has shifted production toward fewer but larger farms, reshaping business relationships between farmers, processors, input suppliers, and local communities. We analyze growth and diversification of U.S. corn, wheat, apple, and beef farms by examining longitudinal changes in 10 size cohorts through three successive censuses. We fail to reject Gibrat’s law in apple and wheat industries and the mean reversion hypothesis in beef and corn industries. Apple and wheat farms diversify over time. The findings suggest that scale economies diminish for large farms across all four industries and scope economies dominate scale economies for large apple and wheat farms. |
| Tipo: Journal Article |
Palavras-chave: Diversification; Firm growth; Gibrat’s law; Longitudinal data; Scale economies; Scope economies; Agribusiness; Farm Management; Production Economics; Q12. |
| Ano: 2009 |
URL: http://purl.umn.edu/48757 |
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| Shumway, C. Richard; Jegasothy, Kandiah; Alexander, William P.. |
| Technical change and the extent to which commodity supplies and input demands are interrelated in Sri Lankan peasant agriculture are explored in this paper. Using a multiple-product dual model, a seemingly unrelated system of product supply and input demand equations is estimated for four crops and four variable inputs. Restrictions based on competitive behaviour and a twice continuously-differentiable production function are maintained in the non-linear least squares estimation. A number of important interrelationships in individual product supplies and input demands are identified, further documenting the need to account for intercommodity production relationships in econometric and simulation studies and in policy formulation. Non-joint production and... |
| Tipo: Journal Article |
Palavras-chave: Productivity Analysis; Research Methods/ Statistical Methods. |
| Ano: 1988 |
URL: http://purl.umn.edu/22575 |
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| Registros recuperados: 58 | |
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