1. School of Economics, Xiamen University, 422 Siming S Rd., Xiamen, Fujian 361005, China
2. School of Management and Data-Mining Research Center, 422 Siming S Rd., Xiamen, Fujian 361005, China
3. School of Mathematics and Statistics, Northeast Petroleum University, 99 Xuefu St., High-Tech Industrial Development Zone, Daqing, Heilongjiang 163318, China
4. Department of Statistics, Tamkang University, 151 Yingchung Rd., Tamsui District, New Taipei City 25137, Taiwan (Corresponding author), e-mail: tzongru@gms.tku.edu.tw, https://orcid.org/0000-0001-6548-7663