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| Registros recuperados: 17 | |
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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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| Laajimi, Abderraouf; Guesmi, Anis; Dhehibi, Boubaker. |
| In Tunisia, the apples occupy a significant place on the sector of perennial crops. This crop covered expanded areas during the eighties following an extensive use of efficient water equipments. However, significant seasonal and annual variation of fruit supplies in the domestic market were frequently encountered affecting prices at both wholesale and consumption levels. To study the supply response of apples we carried out an econometric estimate of the model of supply response. Modelling was carried out in two stages: determination of the variation of the surfaces, on the basis of equation of news plantations and the equation of removals, and the variation of yields. The methodological approach that we followed takes account of the characteristics and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Supply response; Modelling; Expected prices; Apples; Demand and Price Analysis. |
| Ano: 2007 |
URL: http://purl.umn.edu/9392 |
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| Laajimi, Abderraouf; Guesmi, Anis; Mahfoudhi, A.; Dhehibi, Boubaker. |
| In Tunisia, peaches have a significant place in the fruit tree sector. Planted areas have been expanding ever since the eighties as a result of irrigation water extension and the use of better yielding varieties. These factors resulted in high production levels and fruit exports thereof. However, important seasonal and annual variation of fruit supplies continues to characterize prices at both wholesale and consumption levels. To study the response of peach production an econometric model was developed. Modelling was carried out in two stages. First area variation was explained through new plantings and removals and second yield variation was analyzed. The methodological approach followed takes into account the characteristics and... |
| Tipo: Journal Article |
Palavras-chave: Supply response; Modeling; Price expectations; Peaches; Demand and Price Analysis. |
| Ano: 2009 |
URL: http://purl.umn.edu/93801 |
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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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| 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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| Dhehibi, Boubaker; Laajimi, Abderraouf. |
| Number of Tunisian food demand studies have measured the influence of traditional variables, such as income and prices, and in some cases some socio-demographic variables. However, given increasing concerns about health, other important factors, such as the nutritious quality and the nutrient content of food, have also been shown to determine consumer choices. This paper analyses the effect of these factors on the demand for dairy products. The nutritious quality of dairy products is measured by an index that relates nutrient content of each product with the standards suggested by the National Academy of Science. A demand system is estimated and nutrient demand elasticities with respect to prices and expenditure are obtained. Results differ from... |
| Tipo: Journal Article |
Palavras-chave: Dairy products demand; Health awareness; Nutrients; Price/quality index; Tunisia; Agricultural and Food Policy; D12; I12. |
| Ano: 2009 |
URL: http://purl.umn.edu/57279 |
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| Dhehibi, Boubaker; Laajimi, Abderraouf. |
| Most of the literature on Tunisian food demand measures the influence of traditional variables such as income and prices, or some socio-demographic variables. However, nowadays other important factors determine the consumer's final choice, among which are: the nutritious quality, the nutrient content of food and the increasing concern about health. The objective of this paper is twofold. On one hand, the paper aims to analyse the effect of previous factors on meat consumer behaviour. On the other hand, to the author's knowledge, this may well be one of the first studies that use data to answer the previous questions in the case of Tunisia. The nutritious quality of meat is measured by an index that relates nutrient content of each product with the... |
| Tipo: Journal Article |
Palavras-chave: Food Consumption/Nutrition/Food Safety. |
| Ano: 2004 |
URL: http://purl.umn.edu/26405 |
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| Dhehibi, Boubaker; Lachaal, Lassaad; Elloumi, Mohamed; Messaoud, Emna B.. |
| This paper proposes an alternative measure of irrigation water efficiency based on the concept of input-specific technical efficiency. It uses a stochastic production frontier approach, based on Battese and Coelli’s (1995) inefficiency effect model, to obtain farm-specific estimates of technical and irrigation water efficiency, and a second-stage regression approach to identify the factors that influence irrigation water efficiency differentials. This methodology was applied to a sample of 144 citrus farms in Nabeul, Tunisia. Technical efficiency varies widely, suggesting that these citrus farmers could increase their production by as much 33% by using inputs more efficiently. Mean irrigation water efficiency is similarly variable, and on average below... |
| Tipo: Journal Article |
Palavras-chave: Water efficiency; Stochastic frontier production function; Citrus farms; Tunisia; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/57013 |
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| Dhehibi, Boubaker; Gil, Jose Maria; Angulo, Ana Maria. |
| The objective of this paper is to analyze the Spanish demand for food taking into account the consumer's concern about the relationship between food diet and health. This concern is forcing food demand analysts to assume that consumer utility is a function of nutrients instead of simply the food products themselves. A CBS demand model has been considered to model the new demand function obtained, which is estimated with a complete panel data set. Ten broad categories, nine nutrients and the most relevant socio-economic variables have been considered. Finally, after an appropriate model selection strategy, expenditure, price and nutrient elasticities, as well as main sociodemographic effects, have been calculated. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Nutrients; Demand for food; CBS; Panel data; Spain.; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety. |
| Ano: 2003 |
URL: http://purl.umn.edu/25881 |
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| Dhehibi, Boubaker. |
| The objective of this paper is to measure productive efficiency of irrigation water efficiency based on the concept of technical efficiency and compared among different sizes farms in Tunisia. The proposed methodology is applied to a randomly selected sample of 144 citrus growing farms and differentiated by size (small, medium and large farms). A stochastic production frontier approach, based on Battese and Coelli’s (1995) inefficiency effect model, is used to obtain farm-specific estimates of technical and irrigation water efficiency. The last step of the analysis consists on the identification of the factors influencing irrigation water efficiency differentials across citrus growing farms. Empirical results show that estimated mean technical efficiency... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Water Efficiency; Stochastic frontier production function; Small; Medium and large citrus farms; Tunisia; Crop Production/Industries. |
| Ano: 2011 |
URL: http://purl.umn.edu/114441 |
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| Dhehibi, Boubaker. |
| The objective of this paper is to measure productive efficiency of irrigation water efficiency based on the concept of technical efficiency and compared among different sizes farms. The proposed methodology is applied to a randomly selected sample of 144 citrus growing farms located in Nabeul (Tunisia) and differentiated by size (small, medium and large farms). A stochastic production frontier approach, based on Battese and Coelli’s (1995) inefficiency effect model, is used to obtain farm-specific estimates of technical and irrigation water efficiency. The last step of the analysis consists on the identification of the factors influencing irrigation water efficiency differentials across citrus growing farms on the basis on a second-stage regression... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Water Efficiency; Stochastic frontier production function; Small; Medium and large citrus farms; Tunisia; Crop Production/Industries. |
| Ano: 2010 |
URL: http://purl.umn.edu/97328 |
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| Dhehibi, Boubaker; Lachaal, Lassaad. |
| This paper analyse the patterns of productivity and economic growth in the Tunisian agriculture during the 19612000. Results indicated that agriculture output growth where high in both the 19611970 and the 19711980 periods but decreased during the 19912000 period. Average output growth exceeded 6% during the 19811990 period, the average output growth during 19912000 had fallen to 4%. Over the whole period, capital was the most important contributor to output growth and labour is considered as the least significant contributor to economic growth. Total factor productivity contribution to output growth decreased from 4.64% in 19611970 to 2.86% in 19711980. In contrast, this contribution increased in 1981-1990 to close the 4.38%. In the last period,... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Production function; Translog; Agriculture; TFP; Tunisia; International Development; Productivity Analysis; C8; O13; O14. |
| Ano: 2006 |
URL: http://purl.umn.edu/25707 |
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| Registros recuperados: 17 | |
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