TY BOOK TI Assessing Sovereign Creditworthiness KW Sovereign Creditworthiness KW Credit Rating Methodology KW Moody’s Investors Service KW S&P Global Ratings KW Sovereign Default Probability KW Public Finance KW Institutional Quality KW Economic Resilience KW External Vulnerability KW Monetary Policy Effectiveness AU Shapovalov, V.V. PY 2026 PB MGIMO University Publishing House