Educational differences in smoking
selection versus causationWuppertal : Bergische Universität Wuppertal, 21. Dezember 2016
Maternal employment and childhood overweight in Germany
[Preliminary version], Wuppertal : Bergische Univ. Wuppertal, 2015Price convergence in Euroland
evidence from micro data without noiseWuppertal : Bergische Univ. Wuppertal, 2013