6John Whalley,Shunming Zhang,A numerical simulation analysis of (Hukou) labour mobility restrictions in China,Journal of Development Economics 83 (2007) 392-410.
7LIU,Z.,Human capital externalities and rural-urban migration:Evidence from rural China,China,Economic Review (2008),doi:10.1016/j.chieco.2008.04.001.
8Yu Zhu,China's floating population and their settlement intention in the cities:Beyond the Hukou reform,Habitat International 31 (2007) 65-76.