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| Registros recuperados: 10 | |
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| van Zyl, Johan; Townsend, Rob F.; Vink, Nick. |
| This paper attempts to estimate the effects of some of the changes in the marketing system on the Western Cape Province of South Africa, utilizing a regional linear programming model of the agricultural sector of the region. The model includes supply, demand and production risk, and simulates the present agricultural production structure well. Market and trade liberalisation have major impacts on the structure of Western Cape agriculture, particularly the grain and livestock sub-sectors, with only marginal and mostly insignificant effects on horticultural products. |
| Tipo: Journal Article |
Palavras-chave: International Relations/Trade; Marketing. |
| Ano: 1997 |
URL: http://purl.umn.edu/54439 |
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| Randela, Rendani; Liebenberg, Frikkie; Kirsten, Johann F.; Townsend, Rob F.. |
| This article analyses factors influencing farmers’ willingness-to-pay for dipping services, as well as the revealed preference for dipping frequency using the multivariate and the logistic regression models. The study is based on a cross sectional survey of 125 smallscale cattle farmers interviewed in the Venda region of the Northern Province. Empirical multivariate and the logistic regression analysis show that liquidity, human resource, satisfaction with the programme and structure of production significantly influences farmers’ willingness-to-pay. However, the most important factor influencing both the willingness-to-pay and the dipping frequency is liquidity (employment). The results of this study have important implications for the delivery of... |
| Tipo: Journal Article |
Palavras-chave: Livestock Production/Industries. |
| Ano: 2000 |
URL: http://purl.umn.edu/54224 |
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| Townsend, Rob F.. |
| This article reviews some of the recent methodology developed for the analysis of time series data stressing that the statistical properties of the individual series need to be analysed to avoid spurious regressions. A convergence of econometric methodology is entertained with specific focus on cointegration and error correction models which allows the testing of long run relationships between variables and allows for a more dynamic structure than some of the previous models that appear in the literature. An example of this is the commonly used partial adjustment model in supply analysis which is nested in the less restrictive error correction model. Tests can be performed on the validity of these restrictions. These models have a wide application in... |
| Tipo: Journal Article |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 1998 |
URL: http://purl.umn.edu/54908 |
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| Muchena, M.; Piesse, Jenifer; Thirtle, Colin G.; Townsend, Rob F.. |
| This study is based on two 1991 sample surveys, each of ninety farms, in the predominantly arable region of Chiweshe and in the low rainfall area of Gokwe, where animals are more important. The two samples are reasonably representative of the range of conditions found in the communal areas in Zimbabwe. Programming techniques are used to determine the efficiency levels of the farms in each region. The results show that efficiency is positively related to the numbers of both cows and oxen, with only a few farms in Gokwe possibly having too many animals. Farms in Gokwe are on average about two thirds as efficient as those in Chiweshe, which is a measure of the effects of the poorer climate and soils. Non-farm income is also lower, due to lesser opportunities... |
| Tipo: Journal Article |
Palavras-chave: Farm Management; Livestock Production/Industries. |
| Ano: 1997 |
URL: http://purl.umn.edu/54978 |
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| Townsend, Rob F.; Thirtle, Colin G.. |
| The paper presents an empirical investigation of the production response of small scale producers of maize and cotton for communal agriculture in Zimbabwe. The error correction model, which employs the concept of cointegration to avoid spurious regressions, is used in the analysis. The factors affecting maize output were the price of maize relative to seed, the number of marketing depots established in the communal areas and the number of loans provided to these farmers. The factors affecting cotton output were the increase in communal lands due to the resettlement program, the number of loans extended to small scale farmers and the price of cotton relative to seed. The weather played the most significant role in determining the quantity of maize sold. |
| Tipo: Journal Article |
Palavras-chave: Agricultural and Food Policy; Crop Production/Industries. |
| Ano: 1997 |
URL: http://purl.umn.edu/54441 |
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| von Bach, Helmke J. Sartorius; Townsend, Rob F.; van Zyl, Johan. |
| A stochastic frontier production function is defined for panel data on maize producing regions of South Africa. Technical inefficiency effects are assumed to be a function of climatic conditions, time and the terms of trade facing maize producers. The model is derived using nine years of data for the six major maize production regions of South Africa. The results demonstrate how maize farmers have increased their efficiency in the face of a cost-squeeze. The increased efficiency seems to be driven by lower levels of intermediate input use when facing higher costs and uncertain weather conditions. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1998 |
URL: http://purl.umn.edu/54787 |
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| Townsend, Rob F.; van Zyl, Johan; Thirtle, Colin G.. |
| This paper focuses on assessing the benefits of research expenditures on maize production in South Africa. Both the production and supply function approaches are used to calculate elasticities of research expenditure on output and yield. Cointegration is used to establish long-run relationships between variables in these models. The lag structure of R&D expenditures on output is examined making use of the unrestricted, polynomial, beta and gamma distributions. The coefficients of these lag distributions were then used to calculate a rate of return to maize research expenditure, which was estimated as being between 28% and 39% per annum. These rates of return are high, mitigating in favour of more research expenditure rather than less. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 1997 |
URL: http://purl.umn.edu/54718 |
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| Registros recuperados: 10 | |
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