[1] Renmin Univ China, Chongyang Inst Financial Studies, Beijing, Peoples R China
[2] Univ Int Business & Econ, Sch Banking & Finance, Beijing, Peoples R China
[3] Renmin Univ China, China Financial Policy Res Ctr, Beijing, Peoples R China
[4] Renmin Univ China, Sch Finance, Beijing, Peoples R China