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| Registros recuperados: 13 | |
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| Langyintuo, Augustine S.; Mazuze, Feliciano M.; Chaguala, P.A.; Buque, I.A.. |
| This paper proposes a novel approach for estimating farm level seed demand in developing countries. In principle, a farmer views an improved seed as a derived input embodying production attributes and a technology embodying consumption characteristics and jointly decides on its adoption and the quantity of seed required to plant a predetermined area. Drawing on the theory of demand for consumption goods characteristics and production input attributes, this paper specified and estimated improved seed adoption and demand models simultaneously using data collected from 300 randomly selected farm households in the Manica, Sussundenga and Chockwé districts of Mozambique in the 2003/04 crop season. The demand model results suggest that adoption rate, household... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 2006 |
URL: http://purl.umn.edu/21091 |
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| Langyintuo, Augustine S.; Mekuria, Mulugetta. |
| Researchers have traditionally applied censored regression models to estimate factors influencing farmers' decisions to adopt improved technologies for the design of appropriate intervention strategies. The standard Tobit model, commonly used, assumes spatial homogeneity implicitly but the potential for the presence of spatial heterogeneity (spatial autocorrelation or dependence) is high due to neighborhood influence among farmers. Ignoring spatial autocorrelation (if it exists) would result in biased estimates and all inferences based on the model will be incorrect. On the other hand, if spatial dependence is ignored the regression estimates would be inefficient and inferences based on t and F statistics misleading. To account for neighborhood influence,... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Management. |
| Ano: 2005 |
URL: http://purl.umn.edu/19521 |
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| Langyintuo, Augustine S.; Mwangi, Wilfred; Diallo, Alpha O.; MacRobert, John F.; Dixon, John; Banziger, Marianne. |
| The publication describes outcomes of a study conducted in 2007/08 to analyze the bottlenecks affecting the production and deployment of maize seed in eastern and southern Africa. The objectives of the study were to provide a better understanding of the factors limiting the production and deployment of improved maize seed in Africa, and to contribute to increasing the efficiency of variety release, seed production and seed dissemination for new drought tolerant maize varieties. The study identified a number of institutional bottlenecks affecting the maize seed value chain, in particular in the area of policy, credit availability, seed production, germplasm and marketing. To address these bottlenecks and improve the efficiency of seed production and... |
| Tipo: Report |
Palavras-chave: Seed production; Seed industry; Commodity markets; Marketing; Maize; Zea mays; Agricultural products; Yields; Crop yield; Crop Production/Industries; E10; E16; E21; E70; F03. |
| Ano: 2008 |
URL: http://purl.umn.edu/56189 |
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| Langyintuo, Augustine S.; Mwangi, Wilfred; Diallo, Alpha O.; MacRobert, John F.; Dixon, John; Banziger, Marianne. |
| The liberalization and restructuring of the seed sector in eastern and southern Africa (ESA) during the past two decades have witnessed a proliferation of private seed companies in the maize seed industry (Hassan et al., 2001; Lemonius, 2005). Although the total number of registered maize seed companies increased from 8 and 11, respectively, in 1997 to 40 each, the quantities of seed marketed barely doubled, increasing from 23,000 and 27,000 tons to 53,000 and 51,000 tons, respectively; an indication that the reforms are insufficient in ensuring efficient functioning of the sector in the two regions. A study involving 117 seed providers, representing 92 percent of all registered maize seed companies in ESA in 2007 identified bottlenecks that have... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Keywords: Maize seed industry; Seed policies; Eastern and southern Africa; Institutional and Behavioral Economics; International Development; Marketing; D21; M31; O32. |
| Ano: 2009 |
URL: http://purl.umn.edu/51713 |
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| Langyintuo, Augustine S.; Setimela, Peter S.. |
| The publication describes outcomes of a study to assess the effectiveness of a large-scale crop seed relief effort in Zimbabwe during 2003-07. Aims of the effort, which was supported by the British Department for International Development (DfID) and coordinated by the Food and Agricultural Organization (FAO) regional office in Harare, included broader diffusion of open-pollinated maize varieties (OPVs), as opposed to hybrids. Based on the findings of the study, the authors recommend that, to increase benefits to vulnerable groups, participants in such efforts should effectively disseminate information on selecting and recycling seed, supported by training and field demonstrations, and should target relatively well-endowed farmers initially. Recommendations... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agricultural development; Technical aid; Farm income; Food production; Maize; Open pollination; Hybrids; Zimbabwe; Crop Production/Industries; International Development. |
| Ano: 2007 |
URL: http://purl.umn.edu/7655 |
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| Langyintuo, Augustine S.. |
| Interspatial and intertemporal grain distribution in Ghana is a private sector activity carried out mainly by traders. These traders sometimes collude to maximize their joint profits. By so doing they influence the conduct of the grains market. To examine the effect of their actions on the informal maize market in Ghana, a spatial equilibrium model was estimated under three scenarios: (1) Perfect competition, (2) Cournot-Narsh conjectures, and (3) Collusion. The results indicate that imperfect competition distorts grain flows, reduces consumer welfare and depresses traders’ sales revenue. Collusive behavior of traders, on the other hand, causes the greatest distortion of grain flows as well as trader and consumer welfare. These results draw attention to... |
| Tipo: Journal Article |
Palavras-chave: Spatial equilibrium; Monopoly; Imperfect competition; Interspatial; Cournot- Narsh conjectures; Crop Production/Industries; D4; L1. |
| Ano: 2010 |
URL: http://purl.umn.edu/96166 |
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| Langyintuo, Augustine S.; Lowenberg-DeBoer, James; Arndt, Channing. |
| Member countries of the Economic Community of West African States (ECOWAS) are expected to form a West African Monetary Zone (WAMZ) by 2004 whereby member countries would use a common currency in an attempt to promote regional integration. Evidence suggests that reduction in transaction cost as a result of a decrease or complete elimination of non-tariff barriers (NTBs) and a decrease in real interest rates in response to elimination of exchange rate differentials positively influence trade. The objective of this study is to quantify the effects of (a) a 7% real interest rate on capital and (b) zero NTBs within ECOWAS countries on cowpea trade in West and Central Africa in order to provide a measure of the potential impacts of a common monetary policy. The... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: International Relations/Trade. |
| Ano: 2003 |
URL: http://purl.umn.edu/22236 |
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| Registros recuperados: 13 | |
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