3 IZA Discussion Papers
IZA Discussion Paper No. 11850
IZA Discussion Paper No. 4355
published in: Journal of Health Economics, 2009, 28(6), 1099-1115
IZA Discussion Paper No. 1540
published (with Andreas Kuhn) in: Scandinavian Journal of Economics. 2011, 113 (2), 260 - 285