Matthias Wrede
Faculty of Business Administration and Economics
University of Marburg, 35032 Marburg, Germany
eMail: wrede …
Coordination: Bernd Hayo • Philipps University Marburg • Faculty of Business Administration &
Economics • Universitätsstr. 24, D … Business Administration and Economics, Am Plan 2,
35032 Marburg, Germany, eMail: wrede@wiwi.uni-marburg.de
1 Introduction …