4 IZA Discussion Papers
IZA Discussion Paper No. 13633
published in: Journal of Public Economics, 2022, 206, 104582
IZA Discussion Paper No. 7047
published in: German Economic Review, 2013, 14 (3), 282-315.
IZA Discussion Paper No. 3389
published as "Entrepreneurial Innovation and Economic Growth" in: Journal of Macroeconomics, 2009, 31 (4), 602-613
IZA Discussion Paper No. 2558
published in: Wei-Bin Zhang (ed.), UNESCO Encyclopedia of Life Support Systems (Mathematical Models in Economics), Eolss Publishers, Oxford, UK: 2007