1. Guanghua School of Management, Peking University, Room 308, Guanghua New Building, No. 5 Yiheyuan Road, Haidian District, Beijing, China 100871 and IEPR (email: )
2. School of Economics and Management, Harbin Institute of Technology (Shenzhen), Room G315, Shenzhen University Town, Xili, Nanshan District, Shenzhen, China 518055 (email: )
3. Guanghua School of Management, Peking University, Room 308, Guanghua New Building, No. 5 Yiheyuan Road, Haidian District, Beijing, China 100871 and IEPR (email: )