1. Development Economics Group, Wageningen University, PO Box 8130, 6700 EW Wageningen, Netherlands and Department of Land Economy, University of Cambridge.
2. Development Economics Group, Wageningen University, PO Box 8130, 6700 EW Wageningen, Netherlands.
3. Solvay Brussels School of Economics and Management and ECARES, and Center Emile Bernheim, Université Libre de Bruxelles, Franklin Rooseveltlaan 42, 1050 Brussels, Belgium.
4. Development Economics Group, Wageningen University, PO Box 8130, 6700 EW Wageningen, Netherlands, and Department of Economics, Tilburg University.
5. Department of Economics, Econometrics and Finance, University of Groningen, Nettelbosje 2, 9747 AE, Groningen, Netherlands, and Development Economics Group, Wageningen University, PO Box 8130, 6700 EW Wageningen, Netherlands.
6. Department of Spatial Economics and IVM, VU University Amsterdam, De Boelelaan 1105, 1081 HV Amsterdam, Netherlands, and Department of Economics and CentER, Tilburg University, P.O. Box 90153, 5000 LE Tilburg, Netherlands.