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| Registros recuperados: 13 | |
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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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| Xepapadeas, Anastasios; Tzouvelekas, Vangelis; Vouvaki, Dimitra. |
| We examine whether the use of the environment, proxied by CO2 emissions, as a factor of production contributes, in addition to conventional factors of production to output growth, and thus it should be accounted for in total factor productivity growth (TFPG) measurement and deducted from the .residual. A theoretical framework of growth accounting methodology with environment as a factor of production which is unpaid in the absence of environmental policy is developed. Using data from a panel of 23 OECD countries, we show that emissions. growth have a statistically significant contribution to the growth of output, that emission augmenting technical change is present along with labor augmenting technical change, and that part of output growth which is... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Solow Residual; Total Factor Productivity Growth; Growth; Environment; Green Growth Accounting; Environmental Economics and Policy; O47; Q2. |
| Ano: 2007 |
URL: http://purl.umn.edu/9319 |
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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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| Tzouvelekas, Vangelis; Pantzios, Christos J.; Fotopoulos, Christos. |
| The present study utilizes the stochastic production frontier approach in evaluating the technical efficiency rates achieved in four types of Greek organic and conventional farm operations, namely, olive oil-producing, cotton, raisin-producing, and grapes-for-wine producing farms. The empirical results are expected to illustrate possible differences in the technical efficiency scores between the two farming technologies, and provide empirical evidence which at least in the field of organic farming performance is scarce or even absent. Such assessments may also be helpful for pointing out purely economic advantages (or disadvantages) of organic farming, in addition to its environmental dimension, and formulating policies to improve its economic performance. |
| Tipo: Journal Article |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2002 |
URL: http://purl.umn.edu/26462 |
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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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| Tzouvelekas, Vangelis; Pantzios, Christos J.; Fotopoulos, Christos. |
| Using recent advances in the stochastic production frontier framework, this paper presents an empirical analysis of technical, allocative and economic efficiency of a sample of organic and conventional cotton farms located in Greece. The results suggest that both farm types in the sample examined are technically, allocatively and economically inefficient. Farmer's age and education and farm size are important factors in explaining differentials in efficiency estimates. In comparative terms, organic farms exhibit lower efficiency scores vis-à-vis their conventional counterparts in terms of technical and economic efficiency; regarding allocative efficiency both farm types are almost equally inefficient. Low efficiency scores in both types of farming may... |
| Tipo: Journal Article |
Palavras-chave: Cotton; Efficiency; Organic farming; Stochastic production frontier; Productivity Analysis. |
| Ano: 2001 |
URL: http://purl.umn.edu/15288 |
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| Registros recuperados: 13 | |
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