5Alwyn Young."Gold into Base Metal:Productivity Growth in the People￠ Republic of China during the Reform Period[J].Journal of Political Economy,vol.111,no.6.2003
6Baker,George P.,Robert Gibbons & Kevin J.Murphy,Relational Contracts and the Theory of the Firm[J].Quarterly Journal of Economics,Vol.117,39-83.2002.
7Chambers,The Origins and Practice of Participatory Rural Appraisal[J].World Development,22(7):953-969,1994.
