1. Research Institute of Economics and Management, Southwestern University of Finance and Economics, Chengdu 610074, China
2. Department of Marketing School of Economics and Management, Tsinghua University, Beijing 100084, China
3. Institute of Advanced Studies in Humanities and Social Sciences, Beijing Normal University at Zhuhai, Zhuhai 519087, China
4. School of Management, Zhejiang University, Hangzhou 310058, China
5. Department of Geriatrics of the Fourth Affiliated Hospital, School of Public Health, Zhejiang University School of Medicine, Zhejiang University, Hangzhou 310058, China
6. School of Community and Environmental Health, Old Dominion University, Norfolk, VA 23529
7. China Research Center on Disability, Fudan University, Shanghai 200032, China