6 IZA Discussion Papers
IZA Discussion Paper No. 10675
IZA Discussion Paper No. 8611
IZA Discussion Paper No. 4314
revised version published in: Journal of the European Economic Association, 2013, 11 (2), 278–315
IZA Discussion Paper No. 3744
revised version published in: Scandinavian Journal of Economics, 2012, 114 (1), 55-78
IZA Discussion Paper No. 2962
IZA Discussion Paper No. 2544