4 IZA Discussion Papers
IZA Discussion Paper No. 7362
published in: Journal of Economic Geography, 2018, 18 (4), 823-853.
IZA Discussion Paper No. 7283
published in: Canadian Public Policy, 2013, 39 (4), 491-516
IZA Discussion Paper No. 1875
IZA Discussion Paper No. 8
published in: Staatswissenschaften und Staatspraxis, 1998, 9 (2), 191-208