1. Human Capital;Becker,1964
2. The quality of schooling: quantity alone is misleading;Behrman;Am. Econ. Rev.,1983
3. The production of human capital and the life cycle of earnings;Ben-Porath;J. Polit. Econ.,1967
4. The challenge of segmented labor market theories to orthodox theory: a survey;Cain;J. Econ. Lit.,1976
5. Towards a summary and synthesis of the evidence;Cain,1973