4 IZA Discussion Papers
IZA Discussion Paper No. 16206
IZA Discussion Paper No. 14040
published in: D. Checchi, T. Jappelli, A. Uricchio (eds.), Teaching, Research and Academic Careers, Springer, 2022, 135 -161
IZA Discussion Paper No. 11976
IZA Discussion Paper No. 6407
published in: German Economic Review, 2014, 15 (2), 287-328