[1] Southwestern Univ Finance & Econ, Res Inst Econ & Management, Chengdu, Peoples R China
[2] Southwestern Univ Finance & Econ, Res Inst Econ & Management, Collaborat Innovat Ctr Financial Secur, Chengdu, Peoples R China
[3] Neijiang Normal Univ, Sch Econ & Management, Neijiang, Peoples R China