TY JOUR TI ANALYSIS OF THE EFFECTIVENESS OF THE TERRITORIES OF LEADING SOCIO-ECONOMIC DEVELOPMENT IN RUSSIAN SINGLE-CITY STATES KW economic diversification KW closed city KW economic effect KW investment attractiveness KW information openness KW single-industry town KW efficiency assessment KW regional development KW priority social and economic development area (PSEDA) JO MOSCOW ECONOMIC JOURNAL AU Tihomirova, E.S. PY 2025 IS 10 PB Electronic science