1. Department of Economics and Finance, The Academy of Piotrkow Trybunalski, 97-300 Piotrkow Trybunalski, Poland
2. Department of Entrepreneurship and Industrial Policy, Faculty of Management, University of Lodz, 90-237 Lodz, Poland
3. Institute of Management, Faculty of Organization and Management, Lodz University of Technology, 93-005 Lodz, Poland