First Author:   Robert Czudaj University of Duisburg-Essen; FOM Hochschule für Oekonomie & Management robert.czudaj@uni-due.de   Department of Economics, Chair for Statistics and Econometrics, Universitätsstr. 12 Essen, 45117, Germany   00492011833516(Phone) 00492011833516(Fax) Second Author: Joscha Beckmann University of Duisburg-Essen joscha.beckmann@uni-due.de   Department of Economics, Chair for Macroeconomics, Universitätsstr. 12 Essen, 45117, Germany   00492011833215(Phone) 00492011834181(Fax)