1. Department of Management Science and Information Systems, Guanghua School of Management, Peking University, 5 Yiheyuan Road, Beijing 100871, P. R. China
2. Business School, Central University of Finance and Economics, 39 South College Road, Beijing 100081, P. R. China
3. Operations Management & Information Systems (OMIS) Department, Leavey School of Business, Santa Clara University, 500 El Camino Real, Santa Clara, California 95053, United States