Authors
Beata Bieszk-Stolorz
University of Szczecin Faculty of Economics and Management Institute of Econometrics and Statistics Mickiewicza 64, 71-101, Szczecin, Poland
© 2017 Beata Bieszk-Stolorz, published by University of Szczecin
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 License.