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| Registros recuperados: 13 | |
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| Karagiannis, Giannis; Furtan, William Hartley. |
| This paper derives sufficient conditions (in terms of supply and demand elasticities) for producers to gain under different supply shifts when supply and demand are specified to be linear functions and supply is inelastic. It is shown that regardless of the type of supply shift, producers lose whenever the sum of absolute values of supply and demand elasticities is less than one, while they gain when production takes place in the elastic portion of the demand. In all other cases arising from alternative elasticity configurations simple formulas developed in this paper may be used to determine the direction of change in producers surplus. |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis. |
| Ano: 2002 |
URL: http://purl.umn.edu/26430 |
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| Genius, Margarita; Karagiannis, Giannis; Tzouvelekas, Vangelis. |
| The effects of the 2003 CAP reform on the farmers’ decisions on whether to abandon their farming activity, how much to produce and what to produce are analyzed in the present paper. To this effect data collected for Hungarian, Dutch and Greek farmers on their perceptions about the reform and its effects, and on their production intentions is analyzed using discrete choice models under 3 alternative scenarios for the future produce prices. The discrete choice model applied in the present paper is sequential since farmers are confronted with a sequence of choices. In the first stage, the choice is between abandoning farming or continuing, then those farmers who have chosen to continue are presented with two additional choices related to their level of... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: CAP; Farmers choices; MTR assesment; Agricultural and Food Policy; Political Economy; Q10; Q18. |
| Ano: 2008 |
URL: http://purl.umn.edu/44849 |
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| Karagiannis, Giannis; Midmore, Peter; Tzouvelekas, Vangelis. |
| This paper proposes an alternative approach for separating technical change from time-varying technical inefficiency. The approach uses the general index, developed by Baltagi and Griffin (1988), to model technical change along the production function, and a quadratic function of time trend, as in Cornwell, Schmidt and Sickles (1990), to capture the temporal pattern of technical inefficiency. In such a setting, all parameters associated with the rate of technical change and the temporal pattern of technical inefficiency are identified separately. Moreover, the proposed approach is independent of any distributional assumption concerning the one-sided error term associated with technical inefficiency, and can easily be estimated using FGLS. Comparative... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: TIME-VARYING EFFICIENCY; PANEL DATA; DAIRY; Research and Development/Tech Change/Emerging Technologies; O0; Q1. |
| Ano: 1999 |
URL: http://purl.umn.edu/11842 |
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| Karagiannis, Giannis. |
| The impact of proportional profit taxes on input use is analyzed under conditions of production uncertainty and risk aversion. Two kinds of profit taxes are considered: proportional profit taxes with perfect loss offset and revenue-neutral profits taxes. Their impact on optimal input use is examined under various forms of production uncertainty, such as the Just-Pope model and the cases of multiplicative and additive uncertainty. It is shown that the structure of risk attitudes, the form of production uncertainty, the underlying (stochastic) technical interdependencies, and the risk-input relations are crucial features in determining the impact of proportional profit taxes on optimal input use. |
| Tipo: Journal Article |
Palavras-chave: Production Economics. |
| Ano: 1999 |
URL: http://purl.umn.edu/30794 |
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| Karagiannis, Giannis; Sarris, Alexander H.. |
| In this paper we apply the technical inefficiency effect model to a set of eight different crop products (i.e., wheat, mixed arable crops, tobacco, cotton, olive oil, fruits, vegetables, and greenhouse horticulture) in Greek agriculture. For each product, a panel data set covering the period 1991-1995 is used and separate econometric results are obtained for each product. A particular set of socioeconomic and demographic variables is used to explain technical efficiency differentials among Greek farmers, including the direct subsidies given to each farmer, and the concordance of these efficiency determinants is discussed across the eight different crop products considered. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Direct subsidies; Technical efficiency; Greek agriculture; Agricultural Finance. |
| Ano: 2002 |
URL: http://purl.umn.edu/24868 |
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| Karagiannis, Giannis; Tzouvelekas, Vangelis. |
| This paper provides an empirical comparison of time-varying technical inefficiency measures obtained from the econometric estimation of different specifications of the stochastic production frontier model. Specifically, ten different frontier model specifications, which are most widely used in empirical applications, are estimated using a balanced panel data set from the Greek olive-oil sector, consisting of 100 farms observed during 1987-93 period. The empirical results indicate that both the magnitude and individual ranking of technical efficiency estimates differs considerably across models. |
| Tipo: Journal Article |
Palavras-chave: Agricultural and Food Policy. |
| Ano: 2009 |
URL: http://purl.umn.edu/58280 |
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| Karagiannis, Giannis; Tzouvelekas, Vangelis. |
| This paper provides a decomposition of output growth among olive-growing farms in Greece during the period 1987-1993 by integrating Bauer's (1990) and Bravo-Ureta and Rieger's (1991) approaches. The proposed methodology is based on the use of self-dual production frontier functions. Output growth is attributed to the size effect, technical change, changes in technical and input allocative inefficiency, and the scale effect. Empirical results indicate that the scale and the input allocative inefficiency effects, which were not taken into account in previous studies on output growth decomposition analysis, have caused a 7.3% slowdown and a 11.0% increase in output growth, respectively. Technical change was found to be the main source of TFP growth while... |
| Tipo: Journal Article |
Palavras-chave: Production Economics. |
| Ano: 2001 |
URL: http://purl.umn.edu/31431 |
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| Registros recuperados: 13 | |
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