Compliance costs caused by agency action?
Empirical evidence and implications for tax complianceWuppertal : Bergische Univ. Wuppertal, 2012
Corruption in organizations
some outlines for researchWuppertal : Fachbereich Wirtschaftswissenschaft, Berg. Univ. - Gesamthochschule Wuppertal, 2005Collateral damage
educational attainment and labor market outcomes among German war and post-war cohortsWuppertal : Bergische Univ. Wuppertal, 2012Central exit examinations increase performance ... but take the fun out of mathematics
Rev. version, Wuppertal : Bergische Univ. Wuppertal, 2008Creating reproducible publication quality graphics with R
a tutorialWuppertal : Bergische Univ. Wuppertal, 2015Consistently wrong: Neoclassical micro-foundations and the macroeconomic policy ineffectiveness hypothesis
Wuppertal : Bergische Univ. Wuppertal, 2013