1. School of Economics and Management, Tianjin University of Science & Technology, Tianjin, People’s Republic of China
2. College of Management and Economics, Tianjin University, Tianjin, People’s Republic of China
3. Tianjin Laboratory of Modern Urban Governance, Tianjin University, Tianjin, People’s Republic of China
4. College of Metropolitan Transportation, Beijing University of Technology, Beijing, People’s Republic of China