6 IZA Discussion Papers
IZA Discussion Paper No. 11888
IZA Discussion Paper No. 11783
IZA Discussion Paper No. 11151
IZA Discussion Paper No. 7555
revised version published in: Human Relations, 2015, 68 (2), 197-235
IZA Discussion Paper No. 5978
published in: Review of Development Economics, 2012, 16 (4), 527-539
IZA Discussion Paper No. 3094
substantially revised and extended version available as IZA DP No. 5902