1. Department of Business Administration, School of Business, Economics and Law, University of Gothenburg, Gothenburg, Sweden
2. IVL Swedish Environmental Research Institute, Gothenburg, Sweden
3. World Maritime University, Malmö, Sweden
4. Department of Maritime Studies, School of Maritime and Industrial Studies, University of Piraeus, Athens, Greece
5. Department of Mechanics and Maritime studies, Chalmers University of Technology, Gothenburg, Sweden