8Boldrin, Michele and Montes, Ana. The Intergenerational State Education and Pensions [J]. Review of Economics Studies, 2005, 72 (3): 651-664.
9Card, D., Kmeger, A.. Does school quality matter? - Returns to education and the characteristics of public schools in the United States[J]. Journal of Political Economy, 1992, 100:1 - 40.
10Eckstein, Z. and Zilcha, I.. The effects of compulsory schooling on growth, income distribution and welfar [J]. Journal of Public Economics, 1994, 54 (2): 339-359.