Institution: | 1. School of Business, Shanxi Datong University, Datong 037009, PR China;2. Dongling School of Economics and Management, University of Science and Technology Beijing, Beijing 100083, PR China;3. Institute of Policy and Management, Chinese Academy of Sciences, Beijing 100190, PR China;4. Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, PR China\n |