3 IZA Discussion Papers
IZA Discussion Paper No. 7632
published in: Economics of Transition, 2015, 23(1), 105-134
IZA Discussion Paper No. 2803
published in: Review of Economics and Statistics, 2010, 92(1), 187-194
IZA Discussion Paper No. 2729
published in: Industrial and Labor Relations Review, 2008, 61 (4), 502-517