All Rights Reserved
AccessEcon LLC 2006, 2008.
Powered by MinhViet JSC


First Author:
 
Defu Li
School of Economics and management, Tongji University
tjldf@tongji.edu.cn
 
Shanghai, 200092, China
 
 
 

Second Author:

Jiuli Huang
School of Economics, Nankai University
jlhuang@nankai.edu.cn
 
Tianjin, 300457, China