1. School of Management, Nanjing University, Nanjing, Jiangsu 210000, P.R. China;
2. College of Business and Economics, Australian National University, Canberra, Australian Capital Territory 2601, Australia;
3. School of Economics and Management, Tsinghua University, Beijing 100084, P.R. China;
4. Michael G. Foster School of Business, University of Washington, Seattle, Washington 98195