2Goldin ,Claudia and Katz, Lawrence F. The legacy of U.S. educational leadership: notes on distribution and economic in the 20th century[J]. Hunan Capital : Grouth, History and Policy, 2001,91 (2) : 18 - 23.
3Krueger Alan B. and Lindahl, Mikael. Education f or Growth: Why and For Whom? [J ]. The Journal of Economic Literature ,2001,39(4) : 1101 - 1136.