4 IZA Discussion Papers
IZA Discussion Paper No. 16766
IZA Discussion Paper No. 11048
published in: Journal of Human Capital, 2017, 11 (3), 310–351
IZA Discussion Paper No. 10753
Published in: PLoS ONE, 2017, 12(8), e0183277
IZA Discussion Paper No. 8975
published in: American Economic Review, 2015, 105 (5), 346–351