1. UNU-MERIT, United Nations University , Boschstraat 24, Maastricht 6211AX, The Netherlands . e-mail: lema@merit.unu.edu
2. School of Business and Economics, Maastricht University , Maastricht 6211LM, The Netherlands
3. College of Business and Economics, University of Johannesburg , 69 Kingsway Ave, Johannesburg 2092, South Africa
4. Bard College Berlin , Platanenstraße 24, Berlin 13156, Germany . e-mail: t.wuttke@berlin.bard.edu
5. Aalborg University Business School, Denmark , Fibigerstræde 11, 91, Aalborg Ø 9220, Denmark . e-mail: pk@business.aau.dk