1. Becker, G. S. (1964). Human capital. New York: National Bureau of Economic Research.
2. Education and the distribution of earnings;Becker;American Economic Review,1966
3. Crowded pulpits: observations and explanations of the clergy oversupply in the Protestant churches, 1950–1993;Chang;Journal For the Scientific Study of Religion,1999
4. Interpreting the coefficient of schooling in the human capital earnings function;Chiswick;Journal of Educational Planning and Administration,1998
5. Monopsony and discriminating monopsony in the nursing market;Cohen;Applied Economics,1972