1. a School of Public Administration, Xi'an University of Architecture and Technology, Xi'an, China
2. b Water Resources Management Centre, Ministry of Water Resources, Beijing, China
3. c School of Public Policy and Administration, Xi'an Jiaotong University, Xi'an, China
4. d Faculty of Humanities and Social Sciences, Dalian University of Technology, Dalian, China
5. e Bartlett Development Planning Unit, University College London, London, UK