3 IZA Discussion Papers
IZA Discussion Paper No. 7753
published in: Journal of Economic Behavior & Organization, 2017, 137, 191-213
IZA Discussion Paper No. 5024
published in: Small Business Economics, 2013, 40 (2), 459-478
IZA Discussion Paper No. 3818
published in: Economic Journal, 2010, 120(546), F229-F255