Abstract
(2000). -. Journal of Economic Research (Tahghighat- E- Eghtesadi), 35(1), -.
. "-", Journal of Economic Research (Tahghighat- E- Eghtesadi), 35, 1, 2000, -.
(2000). '-', Journal of Economic Research (Tahghighat- E- Eghtesadi), 35(1), pp. -.
-. Journal of Economic Research (Tahghighat- E- Eghtesadi), 2000; 35(1): -.