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1.
Dana Dascal Konstadinos Mattas Vangelis Tzouvelekas 《International Advances in Economic Research》2002,8(2):135-147
In this research study, a gravity model approach was used in order to analyze the main factors affecting the trade flows of wine in the EU. The empirical model was applied using data for the first twelve EU countries for the period 1989–97. It has been clearly shown in the empirical literature that gravity models can be successfully applied to a single commodity market. The present study utilized pooled cross-sectional and time series data in a one-way fixed effects model that accounted for country-pair heterogeneity. The results revealed that wine trade was positively influenced by an increase in GDP per capita, since greater income promotes trade. The remoteness of one country from another influenced exports positively and imports negatively, and the quantities traded did not prove to be very sensitive to wine prices. The depreciation of EU currencies and the high production of wine in the EU increased exports and reduced imports, while EU integration enhanced trade among members. 相似文献
2.
In this paper we present an endogenous growth model to analyze the growth maximizing allocation of public investment among
N different types of public capital. Using this general model of public capital formation, we analyze the stability of the
long-run equilibrium and we derive the growth-maximizing values of the shares of public investment allocated to the different
types of public capital, as well as the growth-maximizing tax rate (amount of total public investment as a share of GDP).
The empirical implication of the model is that both the effects of the shares of public investment and the tax rate on the
long-run growth rate are non-linear, following an inverse U-shaped pattern. Our analysis is completed by showing that the
growth-maximizing shares of public investment and the growth-maximizing tax rate also maximize welfare in the decentralized
economy. 相似文献
3.
Technology Adoption under Production Uncertainty: Theory and Application to Irrigation Technology 总被引:4,自引:0,他引:4
Phoebe Koundouri Céline Nauges Vangelis Tzouvelekas 《American journal of agricultural economics》2006,88(3):657-670
We propose a theoretical framework to analyze the conditions under which a farmer facing production uncertainty (due to a possible water shortage) and incomplete information will adopt a more efficient irrigation technology. A reduced form of this model is empirically estimated using a sample of 265 farms located in Crete, Greece. The empirical results suggest that farmers choose to adopt the new technology in order to hedge against production risk. In addition, we show that the farmer's human capital also plays a significant role in the decision to adopt modern, more efficient irrigation equipment. 相似文献
4.
The temporal pattern of technical efficiency in the technical inefficiency effects model, as modeled by Battese and Coelli
(Empir Econ 20:325–332, 1995), is rather restrictive. Specifically, it a priori imposes a common pattern upon all firms in
the sample, which in addition is monotonic over time. Obviously this is an undesirable implication of the model especially
when there is evidence of strong firm heterogeneity and/or a long time span. To overcome this shortcoming, the present paper
incorporates the Cornwell et al. (J Econom 46:185–200, 1990) flexible specification of the temporal pattern of technical efficiency
into technical inefficiency effects model. The proposed formulation is then applied to the agricultural sector of the EU and
US, during the period 1973–1993. The empirical result support the proposed formulation as quite different temporal patterns
of technical efficiency have been found for the ten countries included in the analysis.
We would like to thank an anonymous referee and an associate editor for valuable suggestions in an earlier version of the
paper. 相似文献
5.
6.
This article attempts to integrate the production‐ and the efficiency‐based approaches for evaluating the impact of extension on farms' performance. For this purpose the nonneutral production frontier model is used, and the empirical analysis refers to a sample of farms from Crete, Greece. The empirical results support the proposed formulation instead of either the production‐ or the efficiency‐based formulations as extension was found to have a statistically significant effect on closing both the technology and management gaps. Public and private extension services were found to be competitive in the production function and complementary in the technical inefficiency effect function. In addition, farms using both public and private extension services achieved a higher degree of technical efficiency than those using either public or private extension services, and farms with no extension services were found to be the least efficient. 相似文献
7.
8.
Konstantinos Mattas Christos Fotopoulos Vangelis Tzouvelekas Stratos Loizou Kostas Polymeros 《International Advances in Economic Research》1999,5(2):255-268
The importance of specific crop sectors can be better cast in a broader framework to account for intersectoral effects. Input-output analysis can provide this framework to assess the importance of the controversial crop, tobacco. In this respect, employment, income, and output multipliers were estimated to demonstrate the dynamics of the sector at the regional and national levels. Furthermore, the impact of totally eliminating tobacco cultivation was computed. Results clearly demonstrate the significance of the tobacco sector and its interrelation with the rest of the economic sectors.This study was partially financed by the Portuguese Association of Tobacco Producers. 相似文献
9.
Vangelis M. Tzouvelekas Konstantinos Giannakas Peter Midmore Konstantinos Mattas 《International Advances in Economic Research》1997,3(2):154-169
This study attempts to contribute to the productivity literature of the agriculture of developing countries by exploring the distribution of technical efficiency over time among olive-growing farms operating in the southern part of Greece—specifically, the island of Crete. A balanced panel data set during the period 1987–93 is utilized for the estimation of the stochastic production frontier. The results show decreasing efficiency for farms since 1987 and suggest the need for a development strategy to improve their economic performance in the context of expected major changes in the Common Agricultural Policy. A further result is that farm size, the farmer's education, the existence of an improvement plan, and land fragmentation are the most important factors explaining inter-farm variation in efficiency. 相似文献
10.
On the choice of functional form in stochastic frontier modeling 总被引:4,自引:1,他引:4
This paper examines the effect of functional form specification on the estimation of technical efficiency using a panel data
set of 125 olive-growing farms in Greece for the period 1987–93. The generalized quadratic Box-Cox transformation is used
to test the relative performance of alternative, widely used, functional forms and to examine the effect of prior choice on
final efficiency estimates. Other than the functional specifications nested within the Box-Cox transformation, the comparative
analysis includes the minflex Laurent translog and generalized Leontief that possess desirable approximation properties. The
results indicate that technical efficiency measures are very sensitive to the choice of functional specification. Perhaps
most importantly, the choice of functional form affects the identification of the factors affecting individual performance
– the sources of technical inefficiency. The analysis also shows that while specification searches do narrow down the set
of feasible alternatives, the identification of the most appropriate functional specification might not always be (statistically)
feasible.
First version received: November 1999/Final version received: July 2001
RID="*"
ID="*" The authors wish to thank Almas Heshmati, Robert Romain, and an anonymous referee for insightful comments and suggestions.
Special thanks go to the associate editor who handled the paper, and whose careful reading and suggestions have improved the
paper substantially. The second author wishes to acknowledge the financial support from “President SSHRC” from the University
of Saskatchewan. The usual caveats with respect to opinions expressed in the paper apply. Senior authorship is shared. This is University of Nebraska-Lincoln Agricultural Research Division Article No. 13270. 相似文献