3 IZA Discussion Papers
IZA Discussion Paper No. 10686
published in: Journal of the European Economic Association, 2018, 16 (5), 1540-1576
IZA Discussion Paper No. 2862
published in revised form in: Journal of Economic Geography, 2010, 10 (6), 913 - 940
IZA Discussion Paper No. 748
published in: Oxford Economic Papers, 2004, 56 (1), 135-150