TY JOUR TI Diagnosis of the level of food security in the region KW food security KW population KW region KW analysis KW assessment KW dynamics KW integral coefficient KW purchasing power JO Economic policy and national security AU Smetanin, M.V. AU Kapustina, E.I. PY 2025 IS 0 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION