[1] China Univ Petr, Sch Econ & Management, Qingdao 266580, Peoples R China
[2] China Univ Petr, Inst Energy Econ & Policy, Qingdao 266580, Peoples R China
[3] Tsinghua Univ, Sch Publ Policy & Management, Beijing, Peoples R China
[4] Natl Univ Singapore, Dept Ind Syst Engn & Management, Singapore, Singapore
[5] Natl Univ Singapore, Energy Studies Inst, Singapore, Singapore