1. Department of Spatial Economics, VU University Amsterdam, De Boelelaan, 1105, 1081 HV Amsterdam, The Netherlands
2. Regional and Urban Economics and in Economic Geography, VU University Amsterdam, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands
3. Spatial Structures, Social Sciences (S4), Brown University Providence, Box 1916, Maxcy Hall 310, RI 02912
4. Regional Science Association International ERC Advanced Grant Holder, Department of Geography and Environment, London School of Economics, Houghton St, London, WC2A 2AE, UK