This work is licensed under the Creative Commons Attribution 4.0 International License.
Michał Pietrzak
PhD, DSc, ProfTit, Warsaw University of Life Sciences, Institute of Economics and Finance,
Department of Economics and Organisation of EnterprisesWarsaw, Poland
Wojciech Ziętara
PhD, DSc, ProfTit, Institute of Agricultural and Food Economics National Research Institute
Department of Economics of Agricultural and Horticultural HoldingsWarsaw, Poland