marc.fischer@wiso.uni-koeln.de
soenke.albers@the-klu.org
friemonika@aol.de
© 2014 Marc Fischer, Sönke Albers, Nils Wagner, Monika Frie, published by Nuremberg Institute for Market DecisionsThis work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.