[1] Southwestern Univ Finance & Econ, Res Inst Econ & Management, Chengdu, Sichuan, Peoples R China
[2] East China Normal Univ, Fac Econ & Management, 3663 N Zhongshan Rd, Shanghai 200062, Peoples R China
[3] Luxembourg Natl Inst Stat & Econ Studies, STATEC Res, L-1468 Luxembourg Kirchberg, Luxembourg