1. School of Statistics and Data Science, LPMC, & KLMDASR, Nankai University, Tianjin, China
2. College of Management and Economy, Tianjin University, Tianjin, China
3. School of Economics, Renmin University of China, Beijing, China
4. School of Mathematics and Statistics and Research Institute of Mathematical Sciences (RIMS), Jiangsu Provincial Key Laboratory of Educational Big Data Science and Engineering, Jiangsu Normal University, Xuzhou, China