5Blinder Alan S., 1973, "Wage Discrimination: Reduced form and Structural Estimates",The Journal of Human Resources,Vol.8,No,4, pp,436-455.
6Dooslaer,E Van. and A.M.Jones, 2003, "Inequalities in Self-reported Health:Validation of A new Approach to Measurement", Journal of Health Economics,Vol.22,pp.61-87.
7Dow William H. and Edward C.Norton, 2002,"The Red Herring that Eats Cake: Heckit Versus Two-part Model Redux",Feb,Triangel Health Economies Working Paper Series,No.l,http://www.unc.edu/the.
8Duan N, Manning WG, Morris CN, Newhouse J.P., 1983,"A Comparison of Alternative Models for the Demand for Medical Care", Journal of Business and Economic Statistics, Vol.l,pp.115-126.
9Duan.N., 1983,"Smearing Estimates: A Non-parametric Retransformation Method".Journal of American Statistical A ssociation,Vol.78,pp.605~610.
10Manning .Willard G. et al., 1987,"Health Insurance and the Demand for Medieal Care: Evidence from a Randomized Experiment", The American Economic Review,No.3,Vol.77,pp.251-277.
