4 IZA Discussion Papers
IZA Discussion Paper No. 9203
published in: Journal of Policy Analysis and Management, 2016, 35(3), 615-638
IZA Discussion Paper No. 9089
IZA Discussion Paper No. 798
published in: Journal of Labor Economics, 2004, 22 (2), 243-298
IZA Discussion Paper No. 525
published in: Journal of Human Resources, 2002, 37(4), 778-811