1. School of Humanities and Law, Northeastern University, Shenyang 110169, China; School of Economics, Northeastern University at Qinhuangdao, Qinhuangdao, China
2. School of Economics, Northeastern University at Qinhuangdao, Qinhuangdao, China
3. Center for China Public Sector Economy Research of KRI, Jilin University, Changchun, China; School of Economics, Jilin University, Changchun, China