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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
14/12/2010 |
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Data da última atualização: |
14/11/2014 |
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Autoria: |
MAREDIA, M. K.; BYERLEE, D. |
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Afiliação: |
MYWISH K. MAREDIA, Michigan State University East Lansing; DEREK BYERLEE, Rural Development Department. |
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Título: |
Efficiency of research investments in the presence of international spillovers: wheat research in developing coutries. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Agricultural Economics, v. 22, p. 1-16, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
Expenditures on agricultural research in the public sector, including the International Agricultural Research Centers (IARCs) have stagnated and in some cases, declined sharply in recent years. This has focused attention on issues of efficiency of agricultural research systems, especially the number, size, scope, type, and locations of their programs. This paper examines the issue of research efficiency through a case study of wheat improvement research in developing countries. The basic premise of this study is that the optimal level of research investment should be determined in a global model that incorporates direct research spill-ins. An analytical framework is developed to determine the threshold levels of crop production in a country (or a region within a country) needed to justify crop improvement research programs of different sizes in the presence of spill-ins from abroad. Spill-in coefficients are estimated from yield performance of varieties of different origins grown across a range of environments. The model is then applied to analyze the efficiency of current investments in 69 wheat improvement research programs in 35 developing countries. A major conclusion of the paper is that given the magnitude of potential spill-ins from the international research system, many wheat research programs could significantly increase the efficiency of resource use by reducing the size of their wheat research programs and focusing on the screening of varieties developed elsewhere. MenosExpenditures on agricultural research in the public sector, including the International Agricultural Research Centers (IARCs) have stagnated and in some cases, declined sharply in recent years. This has focused attention on issues of efficiency of agricultural research systems, especially the number, size, scope, type, and locations of their programs. This paper examines the issue of research efficiency through a case study of wheat improvement research in developing countries. The basic premise of this study is that the optimal level of research investment should be determined in a global model that incorporates direct research spill-ins. An analytical framework is developed to determine the threshold levels of crop production in a country (or a region within a country) needed to justify crop improvement research programs of different sizes in the presence of spill-ins from abroad. Spill-in coefficients are estimated from yield performance of varieties of different origins grown across a range of environments. The model is then applied to analyze the efficiency of current investments in 69 wheat improvement research programs in 35 developing countries. A major conclusion of the paper is that given the magnitude of potential spill-ins from the international research system, many wheat research programs could significantly increase the efficiency of resource use by reducing the size of their wheat research programs and focusing on the screening of varieties developed elsewher... Mostrar Tudo |
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Palavras-Chave: |
CIMMYT; Investment efficiency; Research spillovers; Wheat breeding research. |
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Thesagro: |
Pesquisa; Trigo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02124naa a2200205 a 4500
001 1869790
005 2014-11-14
008 2000 bl --- 0-- u #d
100 1 $aMAREDIA, M. K.
245 $aEfficiency of research investments in the presence of international spillovers$bwheat research in developing coutries.$h[electronic resource]
260 $c2000
520 $aExpenditures on agricultural research in the public sector, including the International Agricultural Research Centers (IARCs) have stagnated and in some cases, declined sharply in recent years. This has focused attention on issues of efficiency of agricultural research systems, especially the number, size, scope, type, and locations of their programs. This paper examines the issue of research efficiency through a case study of wheat improvement research in developing countries. The basic premise of this study is that the optimal level of research investment should be determined in a global model that incorporates direct research spill-ins. An analytical framework is developed to determine the threshold levels of crop production in a country (or a region within a country) needed to justify crop improvement research programs of different sizes in the presence of spill-ins from abroad. Spill-in coefficients are estimated from yield performance of varieties of different origins grown across a range of environments. The model is then applied to analyze the efficiency of current investments in 69 wheat improvement research programs in 35 developing countries. A major conclusion of the paper is that given the magnitude of potential spill-ins from the international research system, many wheat research programs could significantly increase the efficiency of resource use by reducing the size of their wheat research programs and focusing on the screening of varieties developed elsewhere.
650 $aPesquisa
650 $aTrigo
653 $aCIMMYT
653 $aInvestment efficiency
653 $aResearch spillovers
653 $aWheat breeding research
700 1 $aBYERLEE, D.
773 $tAgricultural Economics$gv. 22, p. 1-16, 2000.
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| Registros recuperados : 8 | |
| 1. |  | NASCIMENTO, T. R. de; SENA, P. T. S.; OLIVEIRA, G. S.; SILVA, T. R. da; DIAS, M. A. M.; FREITAS, A. D. S. de; MARTINS, L. M. V.; FERNANDES JUNIOR, P. I. Co-inoculation of two symbiotically efcient Bradyrhizobium strains improves cowpea development better than a single bacterium application. Biotech, v. 11, n. 1, jan. 2021. Article: 4.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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| 2. | | SILVA, V. B. da; BOMFIM, C. S. G.; SENA, P. T. S.; SANTOS, J. C. S.; MATTOS, W. da S.; GAVA, C. A. T.; SOUZA, A. P. de; FERNANDES JUNIOR, P. I. Vigna spp. root-nodules harbor potential pathogenic fungi controlled by co-habiting bacteria. Current Microbiology, v. 78, n. 5, p. 1835-1845, 2021.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
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| 3. | | OLIVEIRA, G. S.; SENA, P. T. S.; NASCIMENTO, T. R. do; FERREIRA NETO, R. A.; PEREIRA, J. R. C.; MARTINS, L. M. V.; FREITAS, A. D. S. de; SIGNOR, D.; FERNANDES JUNIOR, P. I. Are cowpea-nodulating Bradyrhizobial communities influenced by bibochar amendments in soils? genetic diversity and symbiotic effectiveness assessment of two agricultural soils of Brazilian drylands. Journal of Soil Science and Plant Nutrition, v.20, n.2, p. 439-449, 2020.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Semiárido. |
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| 4. | | SENA, P. T. S.; NASCIMENTO, T. R. do; LINO, J. de O. S.; OLIVEIRA, G. S.; FERREIRA NETO, R. A.; FREITAS, A. D. S. de; FERNANDES JUNIOR, P. I.; MARTINS, L. M. V. Molecular, physiological, and symbiotic characterization of cowpea rhizobia from soils under different agricultural systems in the Semiarid region of Brazil. Journal of Soil Science and Plant Nutrition, v, 20, n. 3, p. 1178-1192, 2020.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Semiárido. |
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| 6. | | NASCIMENTO, T. R. do; SENA, P. T. S.; SILVA, T. R.; MARTINS, L. M. V.; FERNANDES JUNIOR, P. I. Produção de auxinas in vitro por rizóbios de feijão--caupi [Vigna unguiculata (L.) Walp.] nativos do Semiárido. In: JORNADA DE INTEGRAÇÃO DA PÓS-GRADUAÇÃO DA EMBRAPA SEMIÁRIDO, 3., 2018, Petrolina. Anais... Petrolina: Embrapa Semiárido, 2018. p. 207-211. (Embrapa Semiárido. Documentos, 284).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 7. | | SENA, P. T. S.; ARAÚJO, L. S.; FERREIRA NETO, R. A.; MARTINS, L. M. V.; FERNANDES JUNIOR, P. I. Diversidade genética de bactérias isoladas de nódulos de feijão-caupi cultivado em solos sob diferentes sistemas em Juazeiro, BA. In: JORNADA DE INTEGRAÇÃO DA PÓS-GRADUAÇÃO DA EMBRAPA SEMIÁRIDO, 2., 2017, Petrolina. Anais... Petrolina: Embrapa Semiárido, 2017. p. 321-327. (Embrapa Semiárido. Documentos, 280).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 8. | | SILVA, A. F. da; MENEZES, K. A. S.; AGUIAR, C. A. da C. de; SANTOS, A. B. dos; OLIVEIRA, X. B. de; SENA, P. T. S.; SEIDO, S. L.; MARTINS, L. M. V.; FERNANDES JUNIOR, P. I. Características fenotípicas de bactérias de nódulos de feijão-caupi nativas de um Argissolo Vermelho Amarelo em Petrolina, PE. In: SIMPÓSIO DE MUDANÇAS CLIMÁTICAS E DESERTIFICAÇÃO NO SEMIÁRIDO BRASILEIRO, 4., 2015, Petrolina. Experiências e oportunidades para o desenvolvimento. Petrolina: Embrapa Semiárido, 2015. 1 CD-ROM. (Embrapa Semiárido. Documentos, 262).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 8 | |
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