1. Human Capital;Becker,1975
2. Human capital and the rise and fall of families;Becker;Journal of Labor Economics,1986
3. The economics of Education;Cohn,1990
4. Davies, P., Whalley, J., 1991. Taxes and capital formation: how important is human capital? In: Bernheim, D., Shoven, J. (Eds.), National Saving and Economic Performance, Chicago.
5. On-the-job training and earnings differences by race and sex;Duncan;Review of Economics and Statistics,1979