1. Faculty of Social Sciences, Rīga Stradiņš University, LV-1007 Riga, Latvia
2. Department of Management, BA School of Business and Finance, LV-1013 Riga, Latvia
3. Department of Business and Tourism Management, Izmail State University of Humanities, 68601 Izmail, Ukraine
4. Department of Automation, Metrology and Energy Efficient Technologies, V. N. Karazin Kharkiv National University, 61022 Kharkiv, Ukraine