3 IZA Discussion Papers
IZA Discussion Paper No. 8258
published in: IZA Journal of European Labor Studies, 2015, 4:15, 1-19
IZA Discussion Paper No. 7244
published in: Economic and Social Review, 2020, 51 (2), 275-303.
IZA Discussion Paper No. 909
published in: Economic Journal, 2007, 117 (518), 375-398