1. Department of Quantitative Methods, University of Pannonia, Veszprém, Hungary
2. Department of Management, University of Pannonia, Veszprém, Hungary
3. Institute of Economics, Faculty of Social Sciences, Eötvös Loránd University, Budapest, Hungary
4. Keleti Károly Faculty of Business and Management, Óbuda University, Budapest, Hungary
5. Department of International Economics, University of Pannonia, Veszprém, Hungary