TY JOUR TI MODELING OF THE MULTIPLIER EFFECT OF TOURISM AND RECREATION ENTERPRISES ON THE QUALITY OF LIFE OF THE REGION'S POPULATION KW tourism and recreation KW quality of life KW regional economy KW mathematical modeling KW social infrastructure KW sustainable development KW socio-economic indicators JO Russian Journal of Management AU Nabieva, A.R. AU Glinskaya, O.S. AU Grischuk, A.V. PY 2026 IS 14 PB Publishing Center RIOR