1. Research Center on Fictitious Economy and Data Science, the Chinese Academy of SciencesBeijing 100190People's Republic of China
2. The Key Laboratory of Big Data Mining and Knowledge Management Chinese Academy of SciencesBeijing 100190People's Republic of China
3. School of Economics and Management, University of Chinese Academy of SciencesBeijing 100190People's Republic of China
4. College of Information Science and Technology, University of Nebraska at OmahaOmahaNE 68182USA