[1] Nanjing Agr Univ, Coll Publ Adm, 1 Weigang, Nanjing 210095, Peoples R China
[2] Nanjing Agr Univ, China Acad Resources Environm & Dev, 1 Weigang, Nanjing 210095, Peoples R China
[3] Nanjing Normal Univ, Sch Business, 1 Wenyuan Rd, Nanjing 210023, Peoples R China