7 IZA Discussion Papers
IZA Discussion Paper No. 16980
forthcoming in: AEA Papers and Proceedings
IZA Discussion Paper No. 16979
forthcoming in: AEA Papers and Proceedings
IZA Discussion Paper No. 14527
IZA Discussion Paper No. 12575
IZA Discussion Paper No. 11976
IZA Discussion Paper No. 6780
published in: Scientometrics, 2013, 95 (3), 1095-1112
IZA Discussion Paper No. 3271
published in: Scientometrics, 2009, 80 (1), 233-254