2012年-IMF国际货币组织全球_Exchange_Rate_Pass_24页_1mb

Summary of "Exchange Rate Pass-Through in Sub-Saharan African Economies and its Determinants"

Core Content

This working paper investigates the exchange rate pass-through (ERPT) in Sub-Saharan African (SSA) economies, focusing on the degree and speed of price adjustments in response to exchange rate changes, as well as the factors that influence these adjustments.

Main Findings

• Incomplete Pass-Through: The study confirms that exchange rate pass-through to domestic prices in SSA is partial and incomplete. On average, a 10 percent depreciation of the local currency leads to a 4 percent increase in domestic prices.
• Depreciation vs. Appreciation: The pass-through effect is larger following a depreciation than after an appreciation. The magnitude of pass-through is significantly higher during periods of depreciation.
• Average Elasticity: The average dynamic pass-through elasticity is estimated at about 0.4, with the effect largely occurring within the first quarter and stabilizing over time.
• Pass-Through Decline: The degree of pass-through has declined since the mid-1990s, coinciding with marked improvements in the macroeconomic and political environments of SSA.

Key Determinants of Pass-Through

• Exchange Rate Regime:

  • Countries with flexible exchange rate regimes exhibit lower pass-through elasticities compared to those with fixed regimes.
  • In fixed regimes, economic agents perceive exchange rate changes as permanent, leading to more rapid adjustments in prices.
  • In flexible regimes, agents view changes as temporary, resulting in delayed price adjustments.

• Income Level:

  • Higher-income countries show lower pass-through elasticities.
  • A larger domestic market may lead to greater competition, limiting firms' ability to fully pass on exchange rate changes.

• Inflation Environment:

  • In high-inflation environments, pass-through is higher, especially in flexible regimes.
  • This is attributed to staggered price-setting behavior in monopolistic competition, where firms adjust prices more rapidly when costs are expected to persist.

• Monetary Policy:

  • Prudent monetary policy (e.g., stable broad money growth) is associated with lower pass-through.
  • In flexible regimes, large increases in broad money are linked to higher pass-through elasticities due to perceived instability.

• Fiscal Policy:

  • Sustainable fiscal policies (e.g., lower fiscal deficits) are associated with lower pass-through.
  • Large fiscal deficits increase uncertainty, leading firms to avoid absorbing or delaying the effects of exchange rate changes.

• Macroeconomic Policy Quality:

  • Good macroeconomic policy is linked to lower pass-through.
  • The Country Policy and Institutional Assessment (CPIA) serves as an indicator of policy quality, with higher CPIA scores corresponding to smaller pass-through elasticities.

Shift in Pass-Through Elasticities

• The decline in pass-through elasticities since the mid-1990s is attributed to improved macroeconomic performance and political stability.
• The pass-through elasticity decreased by about 50% in the SSA region during this period.
• 1997 marks a significant year for the shift in pass-through, with the most distinct and statistically significant changes observed in that year.

Policy Implications

• Improving macroeconomic policies is crucial for reducing the degree of exchange rate pass-through.
• Flexible exchange rate regimes benefit more from policy improvements, as they are more sensitive to changes in the macroeconomic environment.
• Stable inflation, prudent monetary policy, and sustainable fiscal policy contribute to a lower pass-through, reducing the risk of domestic inflation from exchange rate movements.

Methodology

• The study uses panel data analysis and time series techniques to estimate pass-through elasticities.
• Normalized impulse responses from VAR models are employed to capture the dynamic effects of exchange rate shocks on domestic prices.
• Panel unit root and cointegration tests are conducted to ensure the validity of the analysis.
• Coefficient restriction tests are used to assess the hypotheses of zero and complete pass-through.

Conclusion

• The study concludes that exchange rate pass-through in SSA is incomplete, and the degree of pass-through is influenced by exchange rate regimes, income levels, inflation environments, monetary and fiscal policies, and overall macroeconomic policy quality.
• Improving macroeconomic management is essential to mitigate the inflationary effects of exchange rate fluctuations in SSA.