TY JOUR TI EVOLUTION AND CURRENT TRENDS IN THE DEVELOPMENT OF RETAIL CHAIN TRADE IN RUSSIA: A REGIONAL PERSPECTIVE KW retail chain trade KW retail chains KW retail KW retail trade turnover KW regional development KW digital transformation KW e-commerce KW private labels KW market consolidation. JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Abramova, L.A. PY 2026 IS PB ITBO University