IMF-高负债是否制约货币政策？来自通胀预期的证据（英）-2023.6-33页_1mb

Summary of IMF Working Paper WP/23/143: "Is High Debt Constraining Monetary Policy? Evidence from Inflation Expectations"

Introduction

The paper examines whether high government debt levels constrain monetary policy by assessing the impact of debt surprises on inflation expectations in advanced and emerging market economies. It addresses rising sovereign debt, particularly post-COVID-19, and its implications for inflation control and central bank credibility.

Key Findings

• Differential Effects by Economy:
  • In emerging market economies (EMEs), unanticipated increases in government debt-to-GDP ratio raise long-term inflation expectations significantly. A 10 percentage point debt surprise increases inflation expectations by up to 70 basis points within two years.
  • In advanced economies, debt surprises do not affect inflation expectations.
• Key Influencing Factors:
  • Initial Debt Levels: Higher initial debt increases the sensitivity of inflation expectations to debt shocks.
  • Inflation Levels: Higher pre-shock inflation levels amplify the impact in EMEs.
  • Debt Currency Composition: Significant foreign-currency-denominated debt enhances vulnerability, outweighing concerns about central bank monetization.
  • Monetary Policy Regimes: EMEs with non-inflation-targeting regimes show higher sensitivity, while inflation targeting reduces the impact.

Methodology

• Data and Identification: Uses debt surprises derived from IMF WEO forecasts, focusing on unanticipated changes. Employs local projection methods in panel regressions to analyze responses of 5-year inflation expectations across horizons and country groups.
• Controls: Conditions estimates on state variables (debt, inflation, foreign currency debt share) to minimize demand-side effects. Results robust to alternative shock identification methods and subsamples.
• Robustness Checks: Maintains findings across different forecast horizons (e.g., 3-year vs. 5-year expectations), conditioning variables, and proxies for debt sustainability.

Conclusion and Policy Implications

High debt levels constrain monetary policy in EMEs by raising inflation expectations, complicating inflation control. Policy recommendations include:

• Strengthening debt sustainability and central bank credibility.
• Adopting inflation-targeting frameworks to reduce fiscal-monetary coordination issues.
• Addressing foreign currency debt to mitigate external vulnerabilities.