1[7]Wu.Harry X,and Li Zhou,"Rural to Urban Migrationin China" Asia Pacific Econ Liter10.254-267.November1996.
2[8]Ng Ying-chu, Li Sung-ko, and Tsang shu-ki."The incidence of Surplus labor in Rural China: A Nonparametric Estimation". Journal of Comparative Economics 28, 565-580 (2000).
