4 IZA Discussion Papers
IZA Discussion Paper No. 14667
IZA Discussion Paper No. 11038
IZA Discussion Paper No. 10546
substantially revised version published in: Management Science, 2019, 65 (9), 3949-4450.
IZA Discussion Paper No. 1273
published as "The earnings of informal carers: Wage differentials and opportunity costs" in: Journal of Health Economics, 2007, 26 (4), 821-841