[1] Qingdao Univ, Sch Econ, Qingdao 266000, Shandong, Peoples R China
[2] Hong Kong Shue Yan Univ, Dept Econ & Finance, North Point, Hong Kong, Peoples R China
[3] Peking Univ, Natl Sch Dev NSD, Inst South South Cooperat & Dev ISSCAD, Beijing, Peoples R China
[4] North South Univ, Sch Business & Econ, Dhaka, Bangladesh
[5] Tsinghua Univ, Sch Econ & Management SEM, Beijing, Peoples R China