4Andrew Braunstein, Michael McGrath, Donn Pescatrice (1999) . Meeting the Impact of Income and Financial Aid Offers on College Enrollment Decisions [J] . Research in Higher Education, Vol. 40, No. 3, 1999.
5Dresch S. P. (1975) . A Critique of Planning Models for Postseondary Education [J] . Journal of Higher Education,46 (3): 246-286.
6Heller, D. E. (1997): Student Price Response in Higher Education. An Update to Leslie and Brinkman, Journal of Higher Education, 68 (6): 624-659.
7Susan P. Choy (1999) . College Access And Aaffordability[J]. U. S. Department of Education, National Center for Education Statistics (NCES 1999- 108), Wahington: D. C.:1999.
8M. S. McPherson and M. O. Shapiro(1998). The Student Aid Game [J] .Meeting Need and Rewarding Talent in American Higher Education, Princeton, N. J. Princeton University Press, 1998.