4 IZA Discussion Papers
IZA Discussion Paper No. 16109
IZA Discussion Paper No. 16036
IZA Discussion Paper No. 14124
published in: Journal of Labor Economics (special issue in honor of Alan Krueger), 2022, 40 (S1), S179 - S201
IZA Discussion Paper No. 9087
published in: Journal of Health Economics, 2015, 42, 125-138