7 IZA Discussion Papers
IZA Discussion Paper No. 13247
IZA Discussion Paper No. 13010
IZA Discussion Paper No. 12717
IZA Discussion Paper No. 9480
IZA Discussion Paper No. 8915
IZA Discussion Paper No. 7986
published in: Social Science & Medicine, 119 2014, 191–197
IZA Discussion Paper No. 7339