3 IZA Discussion Papers
IZA Discussion Paper No. 5746
short version published as ' The possible adverse impact of innovation subsidies: some evidence from a bivariate switching model' in: Economics Bulletin, 2012, 32 (1), 648-661
IZA Discussion Paper No. 2090
revised version published in: Health Economics, 2010, 19 (8), 906-920
IZA Discussion Paper No. 992
published as 'Public-private sector pay differentials in a devolved Scotland' in: Journal of Applied Economics, 2006, 9, 295-323