[1] Cent Univ Finance & Econ, Sch Econ, Beijing 100081, Peoples R China
[2] Chinese Acad Social Sci, Inst Econ, Beijing 100081, Peoples R China
[3] Xiamen Univ, Collaborat Innovat Ctr Energy Econ & Energy Polic, Sch Management, China Inst Studies Energy Policy, Xiamen 361005, Fujian, Peoples R China
[4] Jiangxi Univ Finance & Econ, Sch Stat, Nanchang 330013, Jiangxi, Peoples R China