1. Department of Geography, University of Idaho, Moscow, ID, USA.
2. Karelian Institute, University of Eastern Finland, Joensuu, Finland.
3. School of Urban and Regional Science, East China Normal University, Shanghai, China.
4. Institute of Belt and Road, School of Business, Qingdao University, Qingdao, China.
5. Department of Geography and Environmental Studies, Carleton University, Ottawa, ONT, Canada.
6. Nijmegen Centre for Border Research, Nijmegen School for Management, Radboud University, Nijmegen, the Netherlands.