2011年-IMF国际货币组织全球_United_Kingdom_Selected_Issues_Paper_60页_1mb

Summary of the United Kingdom: Selected Issues Paper

Core Content

This document, prepared by the IMF staff in July 2011, provides an analysis of three key issues: the near-term inflation outlook in the UK, the factors driving the household saving rate, and the vulnerabilities of household and corporate balance sheets as well as risks to the financial sector.

I. A Bumpy Road Ahead—The Near-Term Outlook for Inflation in the UK

Main Drivers of Inflation

• Headline inflation in the UK has been the highest among major advanced economies since December 2009, exceeding the 2% target.
• Transitory factors such as spiking commodity prices and VAT rate hikes have significantly contributed to recent inflation overruns.
• Exchange rate depreciation (21% over 2008–2010) and unit wage cost increases due to labor hoarding during the recession have also played a role.

Inflation Equation and Decomposition

• A New Keynesian Phillips Curve-based inflation equation was used to decompose recent inflation developments.
• The equation includes variables such as lagged inflation, medium-term inflation expectations, output gap, unit wage costs, exchange rate, commodity prices, and VAT changes.
• The estimated coefficients show that VAT changes have the largest impact on inflation, with a 1 percentage point increase leading to a 0.4 percentage point rise in annual inflation.
• Exchange rate depreciation contributed about 1.1 percentage points to inflation in 2009, decreasing to 0.2 percentage points by 2010Q3.
• Unit wage costs contributed around 0.7 percentage points per quarter during 2009–2010Q2.

Forecasting Inflation

• The central inflation forecast is based on VAR models that incorporate the inflation equation.
• Forecasts suggest headline inflation will exceed 4% for most of 2011 and return to the 2% target by end-2012 as transitory factors dissipate.
• Core inflation is expected to fall to 1.6% by end-2012, as the base effect of VAT increases fades and the output gap becomes more deflationary.

Risks to the Central Scenario

• Upside risks include:
  • A rise in unit wage costs, which could lead to higher inflation.
  • A smaller output gap than currently estimated, which could reduce deflationary pressure.
  • Higher commodity prices, especially oil and food, which could push inflation further.
• Downside risks include a slower-than-expected recovery, which would keep inflation elevated due to continued moderate wage growth and weak productivity.

II. What Drives the UK's Household Saving Rate?

Key Factors

• The household saving rate is influenced by several factors, including:
  • Inflation expectations
  • Real income growth
  • Labor market conditions
  • Interest rates
  • Household debt levels

Empirical Model

• A regression model was used to estimate the saving rate, incorporating variables such as:
  • Inflation expectations
  • Real GDP growth
  • Unemployment rate
  • Interest rates
  • Household debt-to-income ratio

Results

• The model explains a significant portion of saving rate fluctuations.
• VAT changes have a notable impact on saving behavior, as they affect disposable income.
• Inflation expectations have a moderate effect on the saving rate.
• The saving rate has declined since the crisis, reflecting lower real income growth and higher debt levels.

Projections and Implications

• The saving rate is projected to remain low in the short term, driven by weak income growth and high debt.
• Low saving rates could affect household balance sheets, increasing financial vulnerability.
• The model suggests that saving rates may gradually recover as the economy stabilizes and inflation expectations normalize.

III. Vulnerabilities of Household and Corporate Balance Sheets and Risks for the Financial Sector

Key Vulnerabilities

• Household sector:
  • High debt service-to-income ratios, especially for lower-income groups.
  • Nonperforming loans and write-off rates indicate financial strain.
  • Housing developments have been a major driver of household debt.
• Corporate sector:
  • Nonfinancial corporations face debt risks, with a significant portion of debt at risk of default.
  • Contingent claims analysis shows the potential for financial stress in the corporate sector.
  • Funding sources and capital structure are under pressure due to weak economic conditions.

Financial Sector Risks

• Household and financial sector linkages are significant, with high household debt potentially leading to financial instability.
• Corporate and financial sector linkages highlight the interdependence of the economy, where corporate financial stress could spill over into the broader financial system.
• The financial sector is at risk due to the high levels of debt and low savings in the household sector.

Key Findings and Implications

• Inflation in the UK has been driven by transitory factors and is expected to return to the 2% target by end-2012.
• Household saving rates have declined, reflecting weak income growth and high debt levels, which could increase financial vulnerability.
• Balance sheet risks in both household and corporate sectors are significant, with potential spillovers to the financial sector.
• Macroeconomic policy may need to adjust if inflation shocks prove persistent, and leading indicators such as unit wage costs and inflation expectations should be closely monitored.

Conclusion

The UK faces a bumpy inflation path in the short term, with headline inflation expected to remain above 4% in 2011 and gradually return to the target by 2012. The household saving rate has been declining due to a combination of economic conditions and policy changes, raising concerns about financial stability. Both household and corporate balance sheets are under pressure, and the financial sector is vulnerable to shocks from these sectors. Policymakers should closely monitor inflation expectations, wage developments, and economic recovery progress to manage these risks effectively.