[1] Shanghai Maritime Univ, Sch Econ & Management, Shanghai 201306, Peoples R China
[2] Renmin Univ China, Int Coll, Beijing 100872, Peoples R China
[3] Shanghai Lixin Univ Accounting & Finance, Sch Financial Technol, Shanghai 201209, Peoples R China
[4] Shanghai Lixin Univ Accounting & Finance, Sch Business Adm, Shanghai 201209, Peoples R China
[5] European Univ Cyprus, Sch Sci, Dept Comp Sci & Engn, CY-1516 Nicosia, Cyprus