1. 1 University of Lodz , Faculty of Management , ul. Matejki 22/26, 90-237 Łódź , Poland
2. 2 Jagiellonian University , Faculty of Mathematics and Computer Science , 6 prof. Stanisława Łojasiewicza, 30-348 Kraków , Poland
3. 3 Tromso UniversityTromsø School of Business and Economics, UiT The Arctic University of Norway , Narvik Campus, Lodve Langes gate 2, 8514 Narvik , Norway
4. 4 Bayer, Al. Jerozolimskie 158 02-326 Warszawa Poland
5. 5 Czestochowa University of Technology , Faculty of Management , ul. Armii Krajowej 19b 42-200 Czestochowa , Poland