3 IZA Discussion Papers
IZA Discussion Paper No. 4843
published in: Friedrich Schneider (ed.), The Handbook on the Shadow Economy, Edward Elgar Publishing, 2011, 375-408
IZA Discussion Paper No. 4165
revised version published in: Kyklos, 2010, 63 (1), 55-74
IZA Discussion Paper No. 3536
revised version published in: Oxford Bulletin of Economics and Statistics, 2014, 76(3), 411–431