2015年-IMF国际货币组织全球_Dollarization_in_Sub

Dollarization in Sub-Saharan Africa: Experience and Lessons

Core Content

This document provides an in-depth analysis of dollarization in Sub-Saharan Africa (SSA), focusing on its persistence, drivers, and implications for monetary and financial stability. It is authored by a team of IMF staff members led by Mauro Mecagni and Rodolfo Maino, and was published in May 2015. The study aims to understand the unique characteristics of dollarization in SSA and to evaluate the effectiveness of de-dollarization strategies.

Main Viewpoints

• Dollarization in SSA is a notable feature of financial development under macroeconomic instability. It has not significantly increased since 2001, remaining at over 30 percent for both bank loans and deposits.
• SSA is a highly heterogeneous region, with some countries showing little or no dollarization, while others, especially those with natural resource dependence, exhibit significant levels.
• Challenges of Dollarization include:
  • Constraining monetary authorities' ability to act as a lender of last resort.
  • Hindering banks' liquidity management.
  • Amplifying the impact of exchange rate movements on financial stability.
  • Reducing fiscal flexibility and the ability to issue domestic currency debt.
• Benefits of Dollarization may be relevant in economies with high inflation or weak financial systems, where foreign currency can serve as a credible anchor for macroeconomic stability and reduce inflation risk.

Key Information

1. Stylized Facts (2001–12)

• Deposit and Loan Dollarization in SSA did not increase significantly but remained persistent.
• Average deposit dollarization was 29% in 2001 and rose to 31.6% in 2012.
• Average loan dollarization was 26.1% in 2001 and increased to 34.8% in 2012.
• Countries with high natural resource dependence, such as the Democratic Republic of the Congo, Angola, and Zambia, have shown the highest levels of dollarization.
• The CFA zone countries and Lesotho/Swaziland have legal restrictions on foreign currency use, resulting in low or no dollarization.
• Zimbabwe became fully dollarized in 2009 due to hyperinflation.
• Tanzania and Mozambique experienced a reduction in deposit dollarization, while Sierraleone saw an increase.
• Angola and Mozambique recorded significant reductions in both deposit and loan dollarization.
• The original sin problem has somewhat improved, with the ratio of foreign exchange debt to total debt decreasing from 78% in 2001 to 60% in 2012.

2. Determinants of Dollarization

• Inflation and exchange rate depreciation are key drivers of dollarization, as they encourage individuals and firms to use foreign currencies to hedge against domestic currency risk.
• Political instability and dependence on primary commodities also contribute to dollarization.
• Limited financial market development and capital controls are additional factors.
• Asset substitution and currency substitution are two types of dollarization, with the latter being more common in SSA.

3. De-Dollarization Strategies

• Successful de-dollarization requires time, persistence, and coordinated efforts involving sound macroeconomic policies, market-based incentives, and microprudential measures.
• Mandatory measures and direct controls are only effective when combined with market-based approaches.
• De-dollarization in countries like Tanzania and Mozambique was associated with sustained disinflation and stabilization efforts.
• Hysteresis plays a role in the persistence of dollarization, as economic agents may continue to prefer foreign currency even after macroeconomic conditions improve.

Conclusion

The study highlights that while dollarization in SSA remains significant and persistent, progress in de-dollarization has been limited. It emphasizes the importance of understanding the drivers of dollarization and the need for comprehensive strategies to mitigate its risks. The findings suggest that de-dollarization is possible but requires a long-term commitment to macroeconomic stability and financial development.

Key Policy Implications

• Macroeconomic stability is essential for reducing dollarization.
• Financial market development and institutional reforms can help to promote the use of local currency.
• Exchange rate management and monetary policy credibility are critical for de-dollarization efforts.
• Capital account liberalization and monetary policy flexibility can contribute to the reversal of dollarization trends.

References and Annexes

• The study includes several annexes, such as:
  • Annex 1.1: SSA: Households and Firms under Dollarization
  • Annex 1.2: World Dollarization Picture
  • Annex 2.1: Econometric Output
  • Annex 2.2: Unit-Root Tests
  • Annex 2.3: Measures to Mitigate Dollarization

The paper also references key literature on dollarization, including studies by Ghosh, Vetlov, and others, which provide insights into the economic and financial dynamics of dollarization.