1. Faculty of Economics, University of Greifswald, Friedrich-Loeffler-Str. 70, Greifswald, D-17489, Germany; e-mail: joscha.beckmann@uni-greifswald.de
2. FernUniversität in Hagen, Faculty of Business Administration and Economics, Chair for Macroeconomics, Universitätsstr. 11, D-58097, Hagen, Germany
3. Kiel Institute for the World Economy, Hindenburgufer 66, Kiel, D-24105, Germany
4. Ludwig-Maximilians-University Munich, Faculty of Mathematics, Computer Science and Statistics, Chair for Statistics and Econometrics, Akademiestr. 1/I, D-80799, Munich, Germany
5. Chemnitz University of Technology, Faculty of Economics and Business, Chair for Empirical Economics, Thüringer Weg 7, Chemnitz, D-09126, Germany
6. FOM Hochschule für Oekonomie & Management, University of Applied Sciences, Herkulesstr. 32, Essen, D-45127, Germany