4 IZA Discussion Papers
IZA Discussion Paper No. 15879
revised version published in: British Journal of Industrial Relations, 2024, 62 (4), 849 - 877
IZA Discussion Paper No. 6996
IZA Discussion Paper No. 4449
revised version published in: Empirica, 2010, 37(2), 215-236
IZA Discussion Paper No. 4360
published in: European Journal of Political Economy, 2011, 27(4), 625-641