1. School of Economics, Athens University of Economics and Business, Athens, Greece;
2. Department of Technology, Management and Economics, Technical University of Denmark, Kongens Lyngby, Denmark
3. Sustainable Development Unit, Athena Research Center, Athens, Greece
4. ReSEES Research Laboratory, Athens University of Economics and Business, Athens, Greece
5. Machine Learning Group, Faculty of Technology, Bielefeld University, Bielefeld, Germany