3 IZA Discussion Papers
IZA Discussion Paper No. 15842
forthcoming in: Energy Economics, 2023
IZA Discussion Paper No. 8141
revised version published as 'Do Internships Pay Off? The Effects of Student Internships on Earnings' (joint with Shushanik Margaryan and Mathias Schumann) in: Journal of Human Resources, published online before print May 12, 2020
IZA Discussion Paper No. 7103
published in: Labour Economics, 2013, 21, 74-85