8Arellano, M. , and Bond, S. 1991. Some Tests of Specification for Panel Data: Monte Carlo Evidence and an Application to Employment Equations. Review of Economic Studies 58 : 277 - 297.
9Arellano, M. , and Bover, O. 1995. Another Look at the Instrumental Variables Estimation of Error component models. Journal of Econometrics 68:29 -51.
10Bai, Chong- en, Yingyi Qian and Chang -tai Hsieh. 2006. The Return to Capital in China. Brookings Papers on Eco- nomic Activity 2 : 61 - 101.