1. Jean Monnet Chair of European Union, Warsaw School of Economics, Warsaw, Poland
2. Department of International Economics and Economic Development, University of Gdansk, Sopot, Poland
3. Institute for Financial Research and Analyses, University of Information Technology and Management in Rzeszow, Poland
4. Department of Econometrics, University of Gdansk, Sopot, Poland
5. Department of Transport Policy and Economic Integration, University of Gdansk, Sopot, Poland