1. Department of Applied Economics; Erasmus University Rotterdam; Tinbergen Institute; ERIM; P.O. Box 1738 3000 DR Rotterdam the Netherlands
2. Faculty of Architecture and the Built Environment; Delft University of Technology; P.O. Box 5030 2600 GA Delft the Netherlands
3. Department of Economic Geography; Utrecht University, the Netherlands; P.O. Box 80115 3508 TC Utrecht the Netherlands