1. Antai College of Economics and Management, Shanghai Jiao Tong University, 200030 Shanghai, China
2. Department of Industrial Engineering and Decision Analytics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
3. Risk Management Institute and Department of Mathematics, National University of Singapore, Singapore; and National University of Singapore Suzhou Research Institute, Suzhou Industrial Park, 215123 Suzhou, China