6 IZA Discussion Papers
IZA Discussion Paper No. 17368
IZA Discussion Paper No. 14639
IZA Discussion Paper No. 8221
published in: Applied Economics, 2015, 47 (24), 2523-2539
IZA Discussion Paper No. 6776
IZA Discussion Paper No. 6063
published in: Bulletin of Economic Research, 2013, 65 (S1), s142-s164.
IZA Discussion Paper No. 5057
published in: American Economic Review, 2013, 103 (2), 1054-70