1. Department of Marketing, Hanken School of Economics, 00100 Helsinki, Finland
2. Department of Business and Management, LUISS Guido Carli, 00197 Roma, Italy
3. College of Business, Arts and Social Sciences, Brunel University London, Middlesex UB8 3PH, UK
4. Kingston Business School, Kingston University London, Kingston upon Thames KT1 2EE, UK