2 IZA Discussion Papers
IZA Discussion Paper No. 3611
published in: Applied Economics, 2012, 22, 2907 - 2919
IZA Discussion Paper No. 3157
revised version published as 'Safety net still in transition: labour market incentive effects of social support in Poland and Germany' in: Bank i Kredyt, 2010, 41 (3), 5-34