1. CEG-IST, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
2. CEG-IST, Instituto Superior Técnico, Universidade de Lisboa and Statistics Portugal, Lisboa, Portugal
3. Department of Management, Technology and Economics, ETH Zurich, Zürich, Switzerland
4. National Taichung University of Science and Technology, Taichung, Taiwan
5. Faculty of Economics & Management, Free University of Bozen-Bolzano, Bolzano, Italy
6. Department of Business Management, University of Johannesburg, Johannesburg, South Africa