Affiliation: | 1. School of Finance, Anhui University of Finance & Economics, Bengbu, Anhui 233030, PR China;2. School of Management Science and Engineering, Anhui University of Finance & Economics, Bengbu, Anhui 233030, PR China;3. School of Statistics and Mathematics, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, PR China |