TY JOUR TI MATHEMATICAL MODELING OF OPTIMAL PRODUCT PRICING BASED ON DEMAND ELASTICITY KW demand elasticity KW pricing policy optimization KW revenue maximization KW mathematical modeling KW sensitivity analysis KW profit management JO MOSCOW ECONOMIC JOURNAL AU Gorshunova, T.A. AU Morozova, T.A. AU Pihtil'kova, O.A. AU Pronina, E.V. PY 2025 IS 10 PB Electronic science