TY JOUR TI METHODS AND CRITERIA FOR ASSESSING THE DEGREE OF ECONOMIC INTEGRATION USING THE EXAMPLE OF THE EUROPEAN UNION COUNTRIES KW economic integration KW positive integration KW negative integration KW methods for assessing the effectiveness of integration KW macroeconomic convergence KW European Union (EU) JO MOSCOW ECONOMIC JOURNAL AU Zaharova, N.V. AU Sekacheva, A.B. PY 2025 IS 10 PB Electronic science