3 IZA Discussion Papers
IZA Discussion Paper No. 9690
published in: Industrial and Labor Relations Review, 2019, 72 (3), 749-773
IZA Discussion Paper No. 4710
published in: American Economic Review, 2012, 102 (2), 834-864
IZA Discussion Paper No. 4587
published in: Labour Economics, 2011, 18 (6), 872-880