A. Alvarez and C. Arias, Technical efficiency and farm size: A conditional analysis, Agricultural Economics, vol.30, pp.241-250, 2004.

B. Balassa, International trade and finance: Frontiers for research, pp.154-163, 1975.

J. Bergsman, Commercial policy, allocative efficiency and X-efficiency, Quarterly Journal of Economics, vol.88, pp.409-433, 1974.

F. Bergström, Capital subsidies and the performance of firms, Small Business Economics, vol.14, pp.183-193, 2000.

W. M. Corden, The efficiency effects of trade and protection, Studies in international economics, pp.1-10, 1970.

H. O. Fried, S. S. Schmidt, and S. Yaisawarng, Incorporating the operating environment into a nonparametric measure of technical efficiency, Journal of Productivity Analysis, vol.12, issue.3, pp.249-267, 1999.

K. Giannakas, R. Schoney, and V. Tzouvelekas, Technical efficiency, technological change and output growth of wheat farms in Saskatchewan, Canadian Journal of Agricultural Economics, vol.49, pp.135-152, 2001.

H. Guyomard, A. Gohin, and C. Le-mouël, Instruments de soutien interne des revenus agricoles et effets de distorsion sur les échanges : Un modèle avec libre-entrée et endogénéisation du prix de la terre, Revue Economique, vol.52, issue.3, pp.673-682, 2001.

H. D. Leathers, The market for land and the impact of farm programs on farm numbers, American Journal of Agricultural Economics, vol.74, pp.291-298, 1992.

J. P. Martin, X-inefficiency, managerial effort and protection, Economica, vol.45, pp.273-286, 1978.

J. P. Martin and J. M. Page, The impact of subsidies on X-efficiency in LDC industry: Theory and empirical test, The Review of Economics and Statistics, vol.65, issue.4, pp.608-617, 1983.

A. Rezitis, K. Tsiboukas, and S. Tsoukalas, Investigation of factors influencing the technical efficiency of agricultural producers participating in farm credit programs: The case of Greece, Journal of Agricultural and Applied Economics, vol.35, issue.3, pp.529-541, 2003.