1. Department of Industrial and Systems Engineering, University of Minnesota, Minneapolis, Minnesota 55455;
2. School of Management and Economics, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China;
3. Department of Information Systems and Management Engineering, Southern University of Science and Technology, Shenzhen, Shenzhen 518055, China;
4. School of Physical and Mathematical Sciences, Nanyang Technological University, 639798 Singapore, Singapore