4 IZA Discussion Papers
IZA Discussion Paper No. 13745
IZA Discussion Paper No. 10693
IZA Discussion Paper No. 9009
published in: Empirical Economics, 2019, 57 (4), 1443 - 1467
IZA Discussion Paper No. 7322
published in: Review of Economic Studies, 2013, 80 (2), 429-462