|
|
|
| Registros recuperados: 19 | |
|
|
| Taljaard, Pieter R.; Alemu, Zerihun Gudeta; van Schalkwyk, Herman D.. |
| A linear approximated Almost Ideal Demand System (LA/AIDS), estimated in first differences, were used to estimate the demand relations for meat (beef, chicken, pork and mutton) in South Africa from 1970 2000. Two tests for weak separability, including an F and Likelihood ratio version, failed to reject the null hypothesis of weak seperability, confirming that the four meat products are separable, and should be modelled together. According to the Hausman exogeneity test, the expenditure term in the South African meat demand model is exogenous. As a result, a Restricted Seemingly Unrelated Regression (RSUR) was used to estimate the model, whereafter the estimated parameters were used to estimate compensated, uncompensated and expenditure elasticities. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Consumer/Household Economics. |
| Ano: 2003 |
URL: http://purl.umn.edu/19088 |
| |
|
|
| Kidane, Habtom; Alemu, Zerihun Gudeta; Kundhlande, Godfrey. |
| The main objective of the study was to examine the determinants of households' food security using a logistic regression procedure. The model was initially fitted with eleven factors, of which six were found to be significant, and all exhibited the expected signs. These include farmland size, ox ownership, fertilizer application, education level of household heads, household size, and per capita production. The result was analyzed further to compute partial effects and to conduct simulation studies on significant determinant factors. Analysis of partial effects revealed that an introduction to fertilizer use and an improvement in the educational levels of household heads lead to relatively greater probability of food security. On the other hand,... |
| Tipo: Journal Article |
Palavras-chave: Food Security and Poverty. |
| Ano: 2005 |
URL: http://purl.umn.edu/31699 |
| |
|
|
| Kidane, Habtom; Alemu, Zerihun Gudeta; Kundhlande, Godfrey. |
| The main objective of the study is to examine the determinants of households food security using a logistic regression procedure. Initially the model was fitted with eleven factors of which six were found to be significant and all had the expected signs. These include farm land size, ox ownership, fertilizer application, education level of household heads, household size, and per capita production. The result obtained was further analyzed to compute partial effects and to conduct simulation studies on significant factors. Analysis of partial effects revealed that an introduction to fertilizer use and an improvement in the educational level of household heads give relatively higher changes in the probably of food security. On the other hand, simulations... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Food Security and Poverty. |
| Ano: 2004 |
URL: http://purl.umn.edu/9540 |
| |
|
|
| Haile, H.K.; Alemu, Zerihun Gudeta; Kudhlande, G.. |
| The main objective of the study was to examine the determinants of households' food security using a logistic regression procedure. The model was initially fitted with eleven factors, of which six were found to be significant, and all exhibited the expected signs. These include farmland size, ox ownership, fertilizer application, education level of household heads, household size, and per capita production. The result was analyzed further to compute partial effects and to conduct simulation studies on significant determinant factors. Analysis of partial effects revealed that an introduction to fertilizer use and an improvement in the educational levels of household heads lead to relatively greater probability of food security. On the other hand,... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Consumer/Household Economics; Food Security and Poverty. |
| Ano: 2005 |
URL: http://purl.umn.edu/28074 |
| |
|
|
| Alemu, Zerihun Gudeta. |
| In Ethiopia, average cereal production between the period 1990 and 2000 did not change significantly compared to the period between 1974 and 1990. However, cereal production between the period 1990 and 2000 was characterized by significant instability. This study reviews literature on factors with potential impact on instability in cereal production in Ethiopia and applies descriptive and variance decomposition procedures to determine the sources of increased instability in cereal production. It was found that production instability was caused more by increased yield instability than instability in an area. Yield instability could be the result of changes in technology, changes in policy and changes in weather conditions. It was concluded by this study... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Crop Production/Industries. |
| Ano: 2005 |
URL: http://purl.umn.edu/28073 |
| |
|
| |
|
| |
|
|
| Randela, Rendani; Alemu, Zerihun Gudeta; Groenewald, Jan A.. |
| This paper uses data collected from 177 small-scale farming households in Mpumalanga in an effort to identify factors that significantly influence the degree of commercialisation or market participation. A logistic regression model was applied within the transaction costs framework. Results support the hypothesis that transactions costs rank among the main determinants of commercialisation. The following variables were statistically significant: age, ability to speak/understand English, region, ownership of transport, access to market information, distance to market, dependency ratio, trust, land size and ownership of livestock. Increases in the latter four have negative effects on commercialisation. The negative relationship between land size and... |
| Tipo: Journal Article |
Palavras-chave: Market participation; Household commercialisation; Logistic regression; Transaction costs. |
| Ano: 2008 |
URL: http://purl.umn.edu/47656 |
| |
|
| |
|
|
| Alemu, Zerihun Gudeta; Oosterhuizen, K.; van Schalkwyk, Herman D.. |
| This paper quantifies the responsiveness of producers of teff, wheat, maize and sorghum to incentives using an error-correction model (ECM). It is found that planned supply of these crops is positively affected by own price, negatively by prices of substitute crops and variously by structural breaks related to policy changes and the occurrence of natural calamities. It has found significant long-run price elasticities for all crop types and insignificant short-run price elasticities for all crops but maize. Higher and significant long-run price elasticities as compared to lower and insignificant short-run price elasticities are attributable to various factors, namely structural constraints, the theory of supply and the conviction that farmers respond when... |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/9497 |
| |
|
| |
|
| |
|
|
| Alemu, Zerihun Gudeta; Worako, Tadesse Kumma. |
| This study focused on the interrelationships among producer, auction and world prices. In so doing, it criticized previous studies and extended technique developed by Hansen (1999) to handle inferential biases occurring as a result of specification errors. The following results were found: unidirectional transmission of shocks from the world price to the auction price and then to the producer price; asymmetries in price transmissions and adjustments in the auction market; weak interrelationship between producer and world prices causing producer price to be less responsive to changes in the world prices. In general, results imply that coffee growers’ benefit little from positive changes in the world price compared with participants in the auction markets.... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Coffee; Ethiopia; Threshold vector error correction models; Nonlinearity; Demand and Price Analysis. |
| Ano: 2009 |
URL: http://purl.umn.edu/51085 |
| |
|
|
| Worako, Tadesse Kumma; van Schalkwyk, Herman D.; Alemu, Zerihun Gudeta; Ayele, Gezahegn. |
| Coffee producers in Ethiopia have historically received a very small share of the export price of green coffee. Reasons that are often mentioned are heavy government intervention and high marketing and processing costs. Prior to 1992, government regulation of the domestic coffee market in the form of fixed producer prices and the monopoly power of the Ethiopian Coffee Marketing Corporation put a substantial wedge between the producer price and the world price of coffee by imposing an implicit tax on producers. The domestic coffee marketing system in Ethiopia was liberalised after 1992, which was envisaged to have a positive effect on producer prices and price transmission signals from world markets to producers. This paper, with the help of Cointegration... |
| Tipo: Journal Article |
Palavras-chave: Market deregulation; Producer price; Price transmission; Price asymmetry. |
| Ano: 2008 |
URL: http://purl.umn.edu/47658 |
| |
|
| |
|
|
| Taljaard, Pieter R.; Alemu, Zerihun Gudeta; van Schalkwyk, Herman D.. |
| A Linear Approximated Almost Ideal Demand System (LA/AIDS), estimated in first differences, was used to anticipate the demand relations for meat (beef, chicken, pork and mutton) in South Africa from 1970 2000. Two tests for weak separability, including an F and Likelihood ratio version, failed to reject the null hypothesis of weak separability, confirming that the four meat products are separable, and should be modelled together. According to the Hausman exogeneity test, the expenditure term in the South African meat demand model is exogenous. As a result, a Restricted Seemingly Unrelated Regression (RSUR) was used to estimate the model, whereafter the parameters were used as to calculate compensated, uncompensated and expenditure elasticities. |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis. |
| Ano: 2004 |
URL: http://purl.umn.edu/9496 |
| |
|
|
| Alemu, Zerihun Gudeta; Oosthuizen, L.K.; van Schalkwyk, Herman D.. |
| Agriculture in the Ethiopian economy has survived three major structural breaks, namely the 1974 change of policy in favour of a command-based economic system, the 1984 famine and the 1992 change of policy that introduced a market economy. A regression procedure was applied to analyze the effect of these breaks on the slope and intercept of agricultural GDP. In addition, statistical properties were studied to measure the degree of persistence of shocks in agricultural GDP. In the regression equation, only the 1984 famine was found to be significant. The non-significance of policy parameters in the regression equation could be associated with a lack of infrastructural facilities and the subsistence nature of Ethiopian agriculture. The study of the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Political Economy; Productivity Analysis. |
| Ano: 2003 |
URL: http://purl.umn.edu/19089 |
| |
|
|
| Alemu, Zerihun Gudeta; Roe, Terry L.; Smith, Rodney B.W.. |
| This study investigates whether HIV prevalence rates impact TFP growth. We construct a panel of data on general macroeconomic indicators and HIV prevalence rates for over 100 countries, for the years 1994 through 2002, and estimate the impact of HIV on TFP growth rates for each country. We find that HIV can have a large negative impact on factor productivity growth in Southern African countries. For example, factor productivity growth in Lesotho falls by up to 23%, and for South Africa factor productivity growth falls by up to 15%. We then investigate the potential impact of the disease on the economic growth of Lesotho and South Africa. This is accomplished by calibrating a single sector, neoclassical model of economic growth with endogenous savings to... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Health Economics and Policy; International Development. |
| Ano: 2005 |
URL: http://purl.umn.edu/12976 |
| |
|
|
| Shongwe, M.A.; Jooste, Andre; Hugo, A.; Alemu, Zerihun Gudeta; Pelser, A.. |
| There is increasing evidence that most of the fear expressed by consumers in terms of the link between cholesterol in the diet and heart disease is, amongst others, related to the amount of fat in red meat and dairy produce. The result is that many consumers are cutting back on, if not avoiding, red meat products. A major challenge ahead of the beef industry is to supply a product that complies with the demands of more sophisticated and health conscious consumers. But, even if the beef industry could respond positively to consumers needs, it is uncertain whether consumers would pay more for beef containing less fat. In this paper the willingness of consumers to pay for less fat in selected beef cuts (T-bone and rump) was investigated with a... |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis; Food Consumption/Nutrition/Food Safety. |
| Ano: 2007 |
URL: http://purl.umn.edu/8018 |
| |
| Registros recuperados: 19 | |
|
|
|
