The importance of women's education for the social and economic development of Third World countries has been enphasized especially in recent years by international, national organizations and researchers Recent research suggests that "the economic and social returns to education for women are substantial and on the whole probably greater than those for men " (The World Bank,1991) However, the cross-national statistical analysis of this research showed contravercial result that the educational gender gap had a significantly positive impact on economic growth from 1970 to 1985.