1. Department of Economic Theory and Economics of the Agro-Industrial Complex, Samara State Agrarian University, 446442 Kinel, Russia
2. The Basic Department of Trade Policy, Plekhanov Russian University of Economics, 117997 Moscow, Russia
3. Department of Agrochemistry, Soil Science and Agroecology, Samara State Agrarian University, 446442 Kinel, Russia