[Tang, Wang; Zhou, Faming] Hunan Agr Univ, Coll Econ, Changsha, Hunan, Peoples R China.
[Tang, Wang] Hunan Univ Humanities Sci & Technol, Sch Math & Finance, Loudi, Hunan, Peoples R China.
[Zhou, Faming] Hunan First Normal Univ, Sch Business, Changsha, Hunan, Peoples R China.
[Peng, Liulin] Jiangxi Agr Acad, Agr Econ & Informat Res Inst, Nanchang, Jiangxi, Peoples R China.
[Xiao, Min] Zhejiang Gongshang Univ, Sch Stat & Math, Hangzhou, Zhejiang, Peoples R China.