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| Registros recuperados: 1.491 | |
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| Morrison Paul, Catherine J.. |
| The U.S. meat products industries have experienced increasing consolidation. It has been speculated that this has resulted from cost economies, perhaps associated with technical change or trade factors. It has also been asserted that increased concentration in these industries may be allowing the exploitation of market power in the input (livestock) and output (meat product) industries. These issues are addressed for the four digit SIC meat and poultry industries. Findings show that the beef and pork products industries tend to have similar structures, which differ from the poultry industries. None of the industries, however appear to have exhibited excessive market power, particularly when scale economies (diseconomies), and resulting reductions... |
| Tipo: Journal Article |
Palavras-chave: Production Economics. |
| Ano: 1999 |
URL: http://purl.umn.edu/30807 |
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| Mo, Lijia. |
| This study examined whether the efficiency measures were invariant to choice of parametric and nonparametric methods for a sample of 183 wheat farms. The efficiency measures from the deterministic parametric method were smaller than those from the deterministic method. There was a trade-off between scale efficiency and economic efficiency. In the deterministic nonparametric method, the economic efficiency, scale efficiency and overall efficiency results were invariant to the number of inputs or the dimensionality. Only allocative and pure technical efficiency measures depended on the dimensionality. This work illustrated the importance of holding curvature for the cost function in stochastic frontier results. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Efficiency analysis; Deterministic nonparametric method; Parametric stochastic frontier; Production Economics; Q11. |
| Ano: 2009 |
URL: http://purl.umn.edu/56427 |
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| Smale, Melinda; Byerlee, Derek R.; Jayne, Thomas S.. |
| There have been numerous episodes of widespread adoption of improved seed and long-term achievements in the development of the maize seed industry in Sub-Saharan Africa. This summary takes a circumspect view of technical change in maize production. Adoption of improved seed has continued to rise gradually, now representing an estimated 44 percent of maize area in Eastern and Southern Africa (outside South Africa), and 60 percent of maize area in West and Central Africa. Use of fertilizer and restorative crop management practices remains relatively low and inefficient. An array of extension models has been tested and a combination of approaches will be needed to reach maize producers in heterogeneous agricultural environments. Yield growth overall has been... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Sub-Saharan Africa; Maize; Seed; Agricultural and Food Policy; Production Economics. |
| Ano: 2011 |
URL: http://purl.umn.edu/113651 |
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| Registros recuperados: 1.491 | |
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