1. Department of Business Administration, Faculty of Business Administration and Social Sciences, Western Norway University of Applied Sciences, Sogndal, Norway
2. Department of Economics, Faculty of Economic Sciences, Koszalin University of Technology, Koszalin, Poland
3. Department of Marketing, Management and Finance Institute, WSB University in Gdansk, Gdansk, Poland
4. Department of Entrepreneurship and Relationship Management, Faculty of Business and Social Sciences, University of Southern Denmark, Kolding, Denmark