1. College of Economics, Sichuan Agricultural University, Chengdu, Sichuan, China
2. College of Economics and Management, Nanjing Agricultural University, Nanjing, Jiangsu, China
3. Dyson School of Applied Economics and Management, Cornell University, Ithaca, New York, USA
4. College of Economics and Management, Northwest A&F University, Xianyang, Shaanxi, China
5. School of Insurance, Shandong University of Finance and Economics, Jinan, Shandong, China
6. Center for Social Welfare and Public Governance and School of Public Affairs, Zhejiang University, Hangzhou, Zhejiang, China