1. Jilin University of Finance and Economics,Institute of Statistics,Changchun,China
2. Jilin University of Finance and Economics,School of Finance,Changchun,China
3. Xiamen University Tan Kah Kee College,School of Management,Zhangzhou,China
4. Southwest University of Science and Technology,School of Economics and Management,Mianyang,China
5. Hangzhou Dianzi University,School of Materials and Environmental Engineering,Hangzhou,China