[Xu, Xin Long; Lin, Ying Zi] Hunan Normal Univ, Coll Tourism, Changsha, Peoples R China.
[Liu, Shun Jia] Hunan Agr Univ, Sch Business, Changsha, Peoples R China.
[Wu, Dengsheng] Chinese Acad Sci, Inst Sci, Beijing, Peoples R China.
[Wu, Dengsheng] Chinese Acad Sci, Inst Dev, Beijing, Peoples R China.
[Li, Jianping] Univ Chinese Acad Sci, Sch Econ & Management, Beijing, Peoples R China.