3Haveman, R. & Wolfe, B., "The determinants of children attainments: a review of methods and findings. "Journal of Economic Literature33 (1995) : 59- 78.
4Duncan,G. J. & Brooks- Gunn, J. ,"Family poverty, welfare reform, and child development. "Child Development 71 (2000) : 188 - 96.
5Jackson, G.A. & Weathersby, G. B. ,"Individual demand for higher education: A review and analysis of recent empir- ical studies. "The Journal of Higher Education46(1975):623- 652.
6Deininger, K.,"Does cost of schooling affect enrollment by the poor? Universal primary education in Uganda. "Economics of Education Review22 (2003):291 - 305.
7Miller, S. E. , & Hexter, H. ,"How Middle- Income Families Pay for College",American Council on Educa- tion ,Washington, 1985.