1. 题目：international inequality and covergence in educational attainment, 1960-1990
   作者：Zhang J and Li T
   期刊：Review of development economics,2002, 6(3): 383-392.

2. 题目：What difference do polarisation measures make? An application to China
   作者：Zhang X and Kanbur R
   期刊：Journal of development studies, 2001, 37(3):85-98.