[Tang, Shiyi] Hunan Inst Engn, Business Sch, Xiangtan, Peoples R China.
[Zhao, Yu] Shanghai Jiao Tong Univ, Antai Coll Econ & Management, Shanghai, Peoples R China.
[Zheng, Qian] Shanghai Univ Finance & Econ, Sch Finance, Shanghai, Peoples R China.
[Zhao, Yuxin] Hunan Univ, Business Sch, Changsha, Peoples R China.
[Zan, Ao] Changsha Univ Sci & Technol, Sch Econ & Management, Changsha, Peoples R China.