7 IZA Discussion Papers
IZA Discussion Paper No. 11586
IZA Discussion Paper No. 10912
IZA Discussion Paper No. 6624
IZA Discussion Paper No. 5948
published in: Journal of Economic Behavior and Organization, 2016, 126 (Part A), 89 - 101
IZA Discussion Paper No. 5452
revised version published in: American Economic Review, 2015, 105(10), 3030-60
IZA Discussion Paper No. 1896
IZA Discussion Paper No. 1765