7 IZA Discussion Papers
IZA Discussion Paper No. 16777
IZA Discussion Paper No. 15303
IZA Discussion Paper No. 15102
IZA Discussion Paper No. 14479
IZA Discussion Paper No. 14254
IZA Discussion Paper No. 8221
published in: Applied Economics, 2015, 47 (24), 2523-2539
IZA Discussion Paper No. 6760