6Black,D.,V. Henderson. Urban Growth [J]. Journal of Political Economy, 1999,107 (2) :252-84.
7Blanchard O. J.,L. H. Summers. Hysteresis and the European Unemployment Problem [M]. Massachusetts Institute of Technology,Department of Economics, 1986.
8Blanchard O. J.,L. H. Summers. Hysteresis in Unemployment [J]. European Economic Review, 1987,31 (1-2) :288-95.
9Harris,J.,M. Todaro. Migration,Unemployment and Development[J]. American Economic Review,1970,60:126 42.
10Kanbur, R. ,X. Zhang. Fifty Years of Regional Inequality in China:a Journey through Central Planning,Reform,and Openness [J]. Review of Development Economics,2005,9 (1) : 87-106.
