1. Hamburg Institute of International Economics, Baumwall 7, 20459 Hamburg, Germany.
2. Department of Business and Management, Aalborg University, Fibigerstræde 11, 9220 Aalborg, Denmark.
3. Faculty of Economics and Business, University of Groningen, Nettelbosje 2, 9747AE Groningen, The Netherlands.
4. Norwegian School of Economics, Helleveien 30, 5045, Bergen, Norway.