8Huang. Elitism and Equality in Chinese Higher Education [ M ]. Institute of International Education , Stockholm University, Studies in Comparative and International Education,2005 No. 65.
9Spence, M. Market Signaling : Informational Transfer in Hiring and Related Screening Processes [M]. Harvard University Press, 1974.
10Spence, M. Signaling in Retrospect and the Informational Structure of Market [J]. American Economic Review, 2002, (92) : 434 - 459.