4 IZA Discussion Papers
IZA Discussion Paper No. 15660
IZA Discussion Paper No. 13765
IZA Discussion Paper No. 12542
published as 'The Two Disjointed Faces of R&D and the Productivity Gap in Europe' in: Journal of Common Market Studies, 2022, 60 (3), 580 - 603
IZA Discussion Paper No. 3536
revised version published in: Oxford Bulletin of Economics and Statistics, 2014, 76(3), 411–431