[Li, Linfeng] Hunan Agr Univ, Business Sch, Changsha, Peoples R China.
[Li, Guo] Guilin Univ Elect Technol, Sch Business, Guilin, Peoples R China.
[Li, Guo] Beijing Inst Technol, Sch Management & Econ, Beijing, Peoples R China.
[Li, Guo] Beijing Inst Technol, Ctr Energy & Environm Policy Res, Beijing, Peoples R China.
[Liang, Sheng] Hunan Univ, Sch Business Adm, Changsha, Peoples R China.