Campbell, R. and B.N. Siegel (1967) "Demand for higher education in the United States, 1919-1964." Amer. Economic Rev.57 (March): 482-494.
2.
Cardell, N.S. and M.M. Hopkins (1977) "Education, income, and ability: a comment." J. of Pol. Economy85, 1: 211-215.
3.
Chamberlain, G. (1977) "Education, income and ability revisited." J. of Econometrics5, 1: 1-17.
4.
Feldman, P. and S.A. Hoenack (1969) "Private demand for higher education in the United States," pp. 375-395 in U.S. Congress, Joint Economic Committee, The Economics and Financing of Higher Education in the U.S. Compendium of Papers, 91st Congress, lst SessionWashington, DC: Government Printing Office.
5.
Griliches, Z. and W. Mason (1972) "Education, income, and ability." J. of Political Economy80, 3 (pt. 2): S74-S103.
Kenny, L.W., L.F. Lee, G.S. Madala, and R.P. Trost (1979) "Returns to college education: an investigation of self-selection bias based on the project talent data." Int. Economic Rev.20, 3: 775-789.
8.
Lehr, D.K. and J.M. Newton (1978) "'Time series and cross sectional hsvestigationof the demand for higher education." Economic Inquiry 16, 3: 411-422.
9.
Olson, E. and G.S. Tolley (1971) "The interdependence between income and education ." J. of Pol. Economy79, 3: 460-480.
10.
Rccillph, E.E. (1969) "Controversy surrounding negative income taxation ." Public Finance24, 2: 352-361.