6 IZA Discussion Papers
IZA Discussion Paper No. 13016
IZA Discussion Paper No. 12044
IZA Discussion Paper No. 11294
IZA Discussion Paper No. 8757
revised version published in: Econometrica, 2015, 83(6), 2453–2483
IZA Discussion Paper No. 6076
published in: Econometrica, 2012, 80 (5), 2269-2301
IZA Discussion Paper No. 2773
published in: Journal of the Royal Statistical Society, Series A (Statistics in Society), 2012, 175 (1), 153 - 166