1. Center for Applied Statistics School of Statistics Renmin University of China Beijing P. R. China
2. School of Statistics and Data Science Xinjiang University of Finance and Economics Urumqi P. R. China
3. School of Science Beijing Information Science and Technology University Beijing P. R. China
4. School of Business and Economics Humboldt‐Universität Zu Berlin Berlin Germany
5. Department of Information Management and Finance National Yang Ming Chiao Tung University (NYCU) Hsinchu City Taiwan