3 IZA Discussion Papers
IZA Discussion Paper No. 7376
published in Philippe Aghion and Steven Durlauf (eds.), Handbook of Economic Growth, Vol. 2A, The Netherlands: North Holland, pp. 177-215, 2014
IZA Discussion Paper No. 6977
IZA Discussion Paper No. 4747
published in: Journal of the European Economic Association, 2015, 13 (4), 599-630