1. Institute of National and World Economy, Samara State University of Economics, 443090 Samara, Russia
2. Department of Mathematical Methods in Economics, Samara National Research University (Samara University), 443086 Samara, Russia
3. System Integrator “Webzavod”, 443001 Samara, Russia
4. Heat and Power Department, Samara State Technical University, 443100 Samara, Russia
5. Alexandre Lamfalussy Faculty of Economics, Lamfalussy Research Centre, University of Sopron, H-9400 Sopron, Hungary