1. a Department of Innovation , Technology Entrepreneurship and Marketing, School of Industrial Engineering and Innovation Sciences, Eindhoven University of Technology , PO Box 513, 5600, MB Eindhoven, The Netherlands
2. b Department of Organization and Strategy and UNU-MERIT , Maastricht University School of Business and Economics , PO Box 616, 6200, MD Maastricht, The Netherlands
3. c Department of Marketing and Strategy, Faculty of Applied Economics , Hasselt University , B-3590, Diepenbeek, Belgium