[1] Shanghai Jiao Tong Univ, Antai Coll Econ & Management, Shanghai 200030, Peoples R China
[2] Nanjing Audit Univ, Sch Finance, Nanjing 211815, Peoples R China
[3] Stanford Univ, Freeman Spogli Inst Int Studies, Rural Educ Act Program, Stanford, CA 94305 USA
[4] Univ British Columbia, Dept Stat, Vancouver, BC V6T 1Z4, Canada
[5] Nanjing Audit Univ, Inst Social & Econ Res, Nanjing 211815, Peoples R China