1. Department of Economics, Boston University, Boston, Massachusetts 02215;
2. School of Finance, University of International Business and Economics, Beijing 100029, China;
3. School of Management, Xiamen University, Fujian 361005, China;
4. School of Economics, Xiamen University, Fujian 361005, China;
5. DeGroote School of Business, McMaster University, Hamilton, Ontario L8S 4E8, Canada;
6. SAIF, Shanghai Jiaotong University, Shanghai 200030, China;
7. School of Management and Economics, Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China