TY JOUR TI MODELS OF ANALYSIS OF THE FEATURES OF THE DEMOGRAPHIC SITUATION OF THE PENZA REGION KW demography KW fertility KW mortality KW modeling of demographic processes KW regression analysis KW forecasting KW trend model JO MOSCOW ECONOMIC JOURNAL AU Vinnichek, L.B. AU Volkova, G.A. AU Suhanova, O.N. AU Mentyukova, O.V. PY 2024 IS 9 PB Electronic science