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Registros recuperados: 13
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A Unified Approach to the Estimation of Demand for Improved Seed in Developing Agriculture AgEcon
Langyintuo, Augustine S.; Hamazakaza, Petan; Nawale, Edah; Mekuria, Mulugetta.
This paper proposes a new approach for estimating the demand for seed within a developing country context where only improved seeds are sold but adoption rates for improved varieties low. A farmer views an improved seed firstly as a derived input embodying production attributes and secondly, as a technology embodying consumption characteristics. He therefore 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 non-separable household demand and consumption models using data collected from 300 farm households in Zambia during the 2003/04 crop season. The estimated results...
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural household model; Consumer goods characteristics; Production inputs; Technology attributes; Non-separability; Censored equations; Zambia; Crop Production/Industries; C21; D1; O3; Q12; Q16.
Ano: 2006 URL: http://purl.umn.edu/25332
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A Unified Methodology for Estimating the Demand for Improved Seed at the Farm Level in Developing Agriculture AgEcon
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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Accounting for Neighborhood Influence in Estimating Factors Determining the Adoption of Improved Agricultural Technologies AgEcon
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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Adoption of Conservation Agriculture Technologies by Smallholder Farmers in the Shamva District of Zimbabwe: A Tobit application AgEcon
Chiputwa, Brian; Langyintuo, Augustine S.; Wall, Patrick.
Conventional agricultural practices such as the use of the moldboard plough are no longer sustainable due to their extensive soil degradation effects. As a panacea, several Conservation Agriculture (CA) technologies have been promoted to improve soil structure and water conservation. However, adoption of these technologies has been resisted by smallholder farmers and identifying causes of the low adoption rates to facilitate intervention strategies remains a challenge to development practitioners. Using data from 100 farmers, this paper uses a Tobit application to assess the underlying factors important in determining farmers’ adoption of zero-tillage, crop rotation and contour ridging technologies. Empirical results suggest that adoption and use intensity...
Tipo: Conference Paper or Presentation Palavras-chave: Conservation Agriculture (CA); Conventional Farming (CF) technology; Tobit Model; Adoption; Agricultural and Food Policy; Community/Rural/Urban Development; Farm Management.
Ano: 2010 URL: http://purl.umn.edu/98851
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An analysis of the bottlenecks affecting the production and deployment of maize seed in Eastern and Southern Africa AgEcon
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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An analysis of the challenges of the maize seed industry in eastern and southern Africa AgEcon
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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Assessing the influence of neighborhood effects on the adoption of improved agricultural technologies in developing agriculture AgEcon
Langyintuo, Augustine S.; Mekuria, Mulugetta.
Researchers generally assume spatial homogeneity when assessing the factors that influence farmers to adopt improved agricultural technologies. However, the potential for spatial heterogeneity is high due to, for example, neighborhood effects such as farmers sharing information about new technology. Ignoring spatial heterogeneity can result in biased or inefficient regression estimates and make inferences based on t and F statistics misleading. Using data collected from 300 randomly selected farmers in three districts of Mozambique during the 2003/04 crop season, a spatial Tobit model was specified to estimate which factors determined the adoption of improved maize varieties, after an initial diagnostic test rejected the null hypothesis of spatial...
Tipo: Journal Article Palavras-chave: Spatial Tobit model; Spatial heterogeneity; Spatial autocorrelation; Neighborhood effects; Maize farmers; Mozambique; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008 URL: http://purl.umn.edu/56960
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Assessment of the effectiveness of maize seed assistance to vulnerable farm households in Zimbabwe AgEcon
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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Grain Distribution in Ghana under Imperfectly Competitive Market Conditions AgEcon
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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Grain price adjustment asymmetry: the case of cowpea in Ghana AgEcon
Langyintuo, Augustine S..
Patterns in price adjustment in response to information are important to market practitioners. This study looks at cowpea real wholesale price adjustment patterns in Bolgatanga, Wa, Makola and Techiman markets in Ghana. Using Techiman as the central market, a threshold autoregressive test for asymmetric price adjustment rejected the null hypothesis of symmetric adjustment for only the Bolgatanga-Techiman price series. An autoregressive conditional heteroskedastic regression indicates that wholesalers in Bolgatanga market respond differentially to price signals from Techiman than those in the other two markets. This suggests that policies targeting cowpea traders must recognize the differential responses by wholesalers to information.
Tipo: Journal Article Palavras-chave: Africa; Ghana; Wholesalers; Market information; Autoregressive conditional heteroskedasticity; Threshold autoregressive; Crop Production/Industries; D82; D43.
Ano: 2010 URL: http://purl.umn.edu/96165
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Household Resource Endowment and Determinants of Adoption of Drought Tolerant Maize Varieties: A Double-hurdle Approach AgEcon
Legese, Getachew; Langyintuo, Augustine S.; Mwangi, Wilfred; Jaleta, Moti; La Rovere, Roberto.
Existing literature suggests the influence of household wealth on farmer's technology adoption decisions. In 2007, this study was conducted to provide a clearer understanding of how differences in household wealth affect the way in which other variables influence adoption decisions. Using data from 369 households in Adama and Adami Tulu Jido Kombolcha districts of Ethiopia, the paper first stratified households into poorly and well-endowed categories based on wealth indices constructed using their productive assets by the principal components method. A double hurdle model was then specified and estimated for each wealth group to assess factors influencing the adoption and use intensity of improved varieties. The results suggest that factors influencing the...
Tipo: Conference Paper or Presentation Palavras-chave: Wealth index; Double-hurdle model; Ethiopia; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009 URL: http://purl.umn.edu/51785
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POTENTIAL IMPACTS OF THE PROPOSED WEST AFRICAN MONETARY ZONE ON COWPEA TRADE IN WEST AND CENTRAL AFRICA AgEcon
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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The Effect of Household Wealth on Input Market Participation in Southern Africa AgEcon
Langyintuo, Augustine S.; Mungoma, Catherine.
Input technological change, fundamental to rural transformation, sometimes bypasses some rural populations because farmers are often reluctant to use new inputs due to production and price risks that could render their use unprofitable. The level of wealth of the household significantly relates to the household's ability to cope with such risks. Given the highly disproportionate distribution of wealth among rural households, this paper demonstrated that first stratifying households into meaningful wealth categories and estimating non-separable household improved variety adoption and seed demand models for each wealth category provides an opportunity to develop credible policy relevant recommendations on interventions that increase impact. This approach...
Tipo: Conference Paper or Presentation Palavras-chave: Wealth index; Improved maize variety; Consumption characteristics; Production attributes; Derived input; Technological change; Censored regression; Zambia; Consumer/Household Economics; C12; D1; I3; Q12; Q13.
Ano: 2006 URL: http://purl.umn.edu/25630
Registros recuperados: 13
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