1. School of Statistics, University of International Business and Economics, Beijing, People's Republic of China
2. Research Institute for Global Value Chains, University of International Business and Economics, Beijing, People's Republic of China
3. School of Management, Guangzhou University, Guangzhou, Guangdong, People's Republic of China
4. Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, People's Republic of China
5. University of the Chinese Academy of Sciences, Beijing, People's Republic of China