[1] Yunnan Univ Finance & Econ, Int Business Sch, Kunming, Yunnan, Peoples R China
[2] Yunnan Univ Finance & Econ, Sch Business, Kunming, Yunnan, Peoples R China
[3] Zhejiang Univ Technol, Hangzhou, Peoples R China
[4] State Grid Zhejiang Elect Power Corp, Hangzhou, Peoples R China