7 IZA Discussion Papers
IZA Discussion Paper No. 12165
IZA Discussion Paper No. 11317
IZA Discussion Paper No. 10810
IZA Discussion Paper No. 8587
IZA Discussion Paper No. 8029
published in: Journal of Economic Behavior and Organization, 2017, 142, 259-274
IZA Discussion Paper No. 5390
published in: British Journal of Industrial Relations, 2010, 48 (4), 651-669