1Bjortdund, A. and R. Moffltt, 1987, "The Estimation of Wage Gains and Welfare Gains in Serf-Selection Models", Revieto of geonomics and Statistics, 69:42-49.
2Carneiro, P. , 2002, "Heterogeneity and Selection in the Return to Schooling: Implications for Education Policy Evaluation", Ph. D.Dissertation, University of Chicago.
3Carneiro, P. and J. Heckman,2002, "The Evidence on Credit Constraints in Post-Secondary Schooling", Economic Journal, Volume 112,issue 482, pp: 705-734.
4-,2003, "Human Capital Policy," in J. Heckman, A. Krueger. Inequality in America: What Role for Human Capital Policies ,Cambridge, MA: MIT Press.
5Carneiro, P., J. Heckman and E. Vytlacil,2001, "Estimating the Return to Education When It Varies Among Individuals", Working paper,University of Chicago.
6China's Urban Household Income and Expenditure Survey (CUHIES). 2000, National Bureau of Statistics, Urban Soeio-Economic Survey Organization.
7Chow, G. ,2001, China's Economic Transformation. Malden. MA: Blackwell Publishers.
8Gfiliches, Z., 1977, "Estimating the Returns to Schooling: .Some Econometric Problems," Econometrica, Volume 45, number 1, pp. 1-22.
9Heckman, J. ,2001, "Microdata, Heterogeneity and Econometric Policy Evaluation", Nobel Memorial Lecture in Economic Sciences, Journal of Political Economy, 109(4), 673-748.
10Heckman, J., L. Lochner and P. Todd., 2003, "Fifty Years of Mincer Earnings Functions," Unpublished manuscript. University of Chicago.
