6 IZA Discussion Papers
IZA Discussion Paper No. 15979
IZA Discussion Paper No. 14488
IZA Discussion Paper No. 14371
IZA Discussion Paper No. 14312
IZA Discussion Paper No. 12709
published in: American Economic Journal: Applied Economics, 2021, 13 (3), 134 - 175
IZA Discussion Paper No. 12228