3 IZA Discussion Papers
IZA Discussion Paper No. 9952
published in: Economic Modelling, 2016, 58, 442-453.
IZA Discussion Paper No. 6063
published in: Bulletin of Economic Research, 2013, 65 (S1), s142-s164.
IZA Discussion Paper No. 1196
published in Review of Economic Studies, 2006, 73 (4), 1057-1084