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| Registros recuperados: 11 | |
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| Dhehibi, Boubaker; Lachaal, Lassaad; Chebil, Ali. |
| The aim of this paper is to analyze and determine the factors influencing fish demand in Tunisia during the 1975-2000 period. A Box-Cox transformation is used to select the appropriate functional form between linear and double-log models. Results indicate that the double-log form fits better the data and is used for the empirical analysis. Calculated elasticities from static model show that fish demand is price-inelastic and that fish can be considered as a normal good. However, the dynamic analysis using Houthakker-Taylor model suggests that fish consumption in Tunisia depends on consumers psychological-buying habits. Finally, the values of the short and the long-run elasticities indicate that per capita consumption of fish in Tunisia is growing, but at a... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Fish demand; Box-Cox transformation; Double-log model; Tunisia; Demand and Price Analysis; D12; C22. |
| Ano: 2005 |
URL: http://purl.umn.edu/24715 |
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| Frija, Aymen; Buysse, Jeroen; Speelman, Stijn; Chebil, Ali; Van Huylenbroeck, Guido. |
| The paper aims to investigate the economies of scale of Water Users’ Associations (WUA) in Tunisia. During the last years there has been a lot of discussion in Tunisia about the optimal size of WUAs, which allows more efficient management of the water resources at the local level. In this work we propose to see if the size of the WUA in the governorate of Nabeul (Central-Eastern part of Tunisia) would have to increase or decrease in order to maximize their efficiency. Apart from this qualification we also quantify the scale efficiency and scale elasticity of the WUA using Data Envelopment Analysis (DEA) models. The results show that the output space (volume of water distributed and number of ha managed and irrigated) of the WUA that attain a high level of... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2010 |
URL: http://purl.umn.edu/95982 |
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| Lachaal, Lassaad; Chebil, Ali; Dhehibi, Boubaker. |
| This study investigates firm level technical efficiency of production and its determinants in the Tunisian agro-food industry. To this end, a stochastic production frontier model, in which technical efficiency effects are assumed to be a function of firm-specific variables and time, is estimated using panel data on 46 agro-food firms observed over a period of 14 years. Results indicate that technical efficiency in the sample of firms investigated ranges from a minimum of 45% to a maximum of 90% with an average technical efficiency estimate of 67%. Further, investigation of the sources of technical inefficiency in the sample reveals that the age of capital stock and firm size are negatively associated with efficiency, the share of skilled labour is... |
| Tipo: Journal Article |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2004 |
URL: http://purl.umn.edu/26450 |
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| Chebil, Ali; Nasr, Hafedh; Zaibet, Lokman. |
| This paper analyzed the factors that affect farmers’ willingness to adopt salt-tolerant forage for livestock, using a Tobit model. The data used for the empirical analysis was obtained from a survey of 97 farmers in southeastern Tunisia. The results of this study show that variables related to age, education level, the salinity level of water and membership in a farmers’ association do not significantly influence the degree to which salt-tolerant forage production is adopted. It did, however, find a positive relationship between off-farm income availability and adoption. In addition, the flock size variable, expressed in Standard Livestock Units, has a significant and positive relationship with adoption. This indicates farmers’ need to cover their forage... |
| Tipo: Journal Article |
Palavras-chave: Farmers’ willingness to adopt; Salt-tolerant forage; Tobit model; Tunisia; Crop Production/Industries. |
| Ano: 2009 |
URL: http://purl.umn.edu/56952 |
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| Dhehibi, Boubaker; Lachaal, Lassaad; Karray, B.; Chebil, Ali. |
| The aim of this paper is to investigate the relative contribution of technical efficiency, technological change and increased input use to the output growth of the Tunisian olive oil growing farms using a stochastic frontier production function approach applied to panel data for the period 1995- 1997. The proposed methodology is based on the use of a flexible translog functional form. Results indicate that technical efficiency of production in the sample of olive producing farms investigated ranges from a minimum of 24.8% to a maximum of 84.6% with an average technical efficiency estimate of 48.5%. This suggests that olive producers may increase their production by as much as 51.5% through more efficient use of production inputs. Further, the production is... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Olive oil sector; Tunisia; Productivity; Crop Production/Industries; Demand and Price Analysis. |
| Ano: 2006 |
URL: http://purl.umn.edu/10037 |
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| Chebil, Ali; Frija, Aymen; Abdelkafi, Belhassen. |
| This study aims first to measure the farm specific irrigation water use efficiency (IWUE), through non parametric DEA model; and second to evaluate the potential irrigation cost reductions and identify the main factors causing variations in IWUE among the sample farms. Cross sectional data collected from a sample of 75 farms participating in the WaDImena project in Nadhour region (northern Tunisia) was used for this aim. The results showed that the average level of IWUE across the farm sample was around 61.2% under variable returns to scale (VRS) assumption. However, the estimated mean irrigation water technical cost efficiency (ITCE) is much higher than IWUE. Farmers would be able to reduce their actual cost by 5% under VRS by adjusting irrigation water... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2010 |
URL: http://purl.umn.edu/96158 |
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| Chebil, Ali; Na, Hafedh, Sr.; Zaibet, Lokman. |
| This paper analyzed the factors that affect farmers' willingness to adopt salt-tolerant forage as forage source for livestock using a Tobit model. The data used for the empirical analysis has been obtained from a survey of 97 farmers in south-eastern Tunisia. The results of this study show that variables related to age, education level, salinity level of water and membership in a farmers' associations do not significantly influence adoption degree of salt-tolerant forage production. However, a positive relationship between off-farm income availability and adoption is found. Finally, the flock size variable, expressed in Standard Livestock Unit, has a significant and positive relationship with adoption. This indicates the need of farmers to cover their... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Livestock Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/9437 |
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| Registros recuperados: 11 | |
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