5 IZA Discussion Papers
IZA Discussion Paper No. 17370
IZA Discussion Paper No. 16762
IZA Discussion Paper No. 14225
IZA Discussion Paper No. 11757
published in: American Economic Journal: Applied Economics, 2021, 13 (4), 258–284
IZA Discussion Paper No. 10180
published in: Labour Economics, 2016, 42, 87-100