4 IZA Discussion Papers
IZA Discussion Paper No. 13647
published in: Explorations in Economic History, 2024, 94, 101615
IZA Discussion Paper No. 9792
published in: Labour Economics, 2020, 62, 101778
IZA Discussion Paper No. 7725
published in: Journal of Labor Economics, 2017, 35 (4), 1089-1116
IZA Discussion Paper No. 4445
published in: Charles T. Clotfelter (ed.), American Universities in a Global Market, NBER, 2010