4Harris, J and M P, Todaro, 1970, Migration, Unemployment and Development: A Two-sector Analysis, The American Economic Review,126-142.
5Sjaastad, L A , 1962, The Costs and Returns of Human Migration, The Journal of Political Economy, Vol, 70, No. 5.
6Zhao,Yaohui, 1999, Labor Migration and Earnings Differences: The Case of Rural China, Economic Development & Cultural Change, Vol.47, p767.
7Barro R. and Sala-I-Martin X., 1991. Convergence across States and Regions[J]. Brookings Papers on Economic Activity, no. 1, pp.107~182.
8Barro R. and Sala-I-Martin X., 1992. Regional Growth and Migration: A Japan-United States Comparison-[J]. Journal of Japanese and International Economy, vol.6, no.4, pp.312~346.
9Krugman P. and Venables J., 1995. Globalization and the Inequity of Nations [J]. Quarterly Journal of Economics, vol.CX, no.4, pp.857~880.
10Krugman P., 1980. Scale Economies, Product Differentiation,and Pattern of Trade[J]. American Economic Review, vol.70,pp.950~959.