1. 1) Zhao, Y, “Leaving the Countryside: Rural-to-Urban Migration Decisions in China,” AEA Papers and Preceedings, 89 (2), 1999a, 281-286.
2. 2) Zhao, Y, “Labor Migration and Earnings Differences: The Case of Rural China,” Economic Development and Cultural Change 47 (4), 1999b, 767-782.
3. 3) State Statistical Bureau of China, “China Statistical Year Book 2009” (online version). http://www.stats.gov.cn/tjsj/ndsj/2008/indexch.htm, accessed on May 20th, 2009.
4. 4) BBC News, “China Rural-Urban Wage Gap Widens,” January 16, 2009, http://news.bbc.co.uk/2/hi/asiapacific/7833779.stm, accessed on May 28th, 2009.
5. 5) Statistical Bureau of China, “China Statistical Yearbook 2008,” Available at http://www.stats.gov.cn/tjsj/ndsj/2008/indexch.htm, accessed on July 16, 2009.