4 IZA Discussion Papers
IZA Discussion Paper No. 13373
IZA Discussion Paper No. 2143
published in: Journal of the European Economic Association, 2011, 9 (3), 551-589
IZA Discussion Paper No. 665
revised version published as 'Fancy a stay at the 'Hotel California'? in: Kyklos, 2005, 58 (4), 519-535
IZA Discussion Paper No. 423
published in: European Economic Review, 2003, 47(4), 645-668