4 IZA Discussion Papers
IZA Discussion Paper No. 16502
IZA Discussion Paper No. 14660
published in: Applied Economics, 2022, 54 (55), 6406 - 6417
IZA Discussion Paper No. 11841
published in: Journal of Human Resources, 2022, 57 (3), 998-1032;
IZA Discussion Paper No. 9569