4 IZA Discussion Papers
IZA Discussion Paper No. 16767
IZA Discussion Paper No. 6110
published in: The Economic Journal, 2016, 126 (3): 465–506. [Online First]
IZA Discussion Paper No. 5232
published in: Health Economics, 2013, 22 (6), 655-672
IZA Discussion Paper No. 2633
published in: Journal of Health Economics, 2008, 27, 218-233