YIN Kui1; LI Xiu-Feng1,3; SUN Jian-Min1; YU Hao-Ying2
(1 School of Labor and Human Resources, Renmin University of China, Beijing 100872, China) (2 School of Finance, Renmin University of China, Beijing 100872, China) (3 School of Management Science and Engineering, Shandong Normal University, Jinan 250014, China)