1. CDFMR, Warsaw University of Life Sciences – SGGW, Faculty of Economic Sciences, Department of European Policy, Public Finance and Marketing, Nowoursynowska 166, 02–972 Warsaw, Poland
2. DMR, Warsaw University of Life Sciences – SGGW, Faculty of Applied Informatics and Mathematics, Department of Econometrics and Statistics, Nowoursynowska 166, 02-972 Warsaw, Poland