2000年-世界发展银行全球_Currency_Substitution_in_Latin_America___Lessons_from_the_1990s_34页_1mb

Summary of "Currency Substitution in Latin America: Lessons from the 1990s"

Core Content

This paper investigates the phenomenon of currency substitution in Latin America, particularly focusing on the 1990s, and explores its causes, significance in banking crises, and macroeconomic consequences. The study is conducted by Pere Gomis-Porqueras, Carlos Serrano, and Alejandro Somuano, and is part of the World Bank's Policy Research Working Paper Series.

Main Findings

• Currency substitution refers to the use of foreign currency (primarily the U.S. dollar) in place of domestic currency for transactions, savings, and as a store of value.
• Dollarization is the process by which a national currency is replaced by the U.S. dollar as legal tender, and it is often linked to currency substitution.
• The dollar deposits to broad money ratio is strongly influenced by expectations of depreciation and income levels.
• Currency substitution has been associated with increased macroeconomic volatility and reduced monetary independence, making it difficult for central banks to manage monetary policy effectively.
• Banking crises are more likely in highly dollarized economies, and currency substitution increases the probability of future crises after an initial banking crisis.

Key Points

• Expectations of depreciation are a primary driver of currency substitution. When individuals expect their domestic currency to lose value, they tend to hold more foreign currency.
• Income levels also play a role, with higher-income economies showing a greater degree of currency substitution.
• Dollarization is not only a result of individual behavior but is also influenced by institutional factors, such as government policies that restrict or allow foreign currency deposits.
• The volatility of macroeconomic variables (e.g., GDP, inflation, exchange rates) increases with currency substitution, complicating monetary policy targets.
• Past banking crises are good predictors of future ones in highly dollarized economies, indicating a persistence effect in banking instability.

Macroeconomic Consequences

• Currency substitution can lead to greater exchange rate exposure, which exacerbates the impact of bad shocks on the banking system.
• It reduces the central bank's ability to act as a lender of last resort, and complicates monetary policy due to the presence of foreign currency deposits.
• Seigniorage loss occurs as governments lose the ability to generate revenue from the printing of money.
• The presence of foreign currency deposits can increase the likelihood of a prolonged banking crisis once the initial crisis has occurred.

Methodology

• The authors use panel data from 13 Latin American countries (1990–1998) to estimate a portfolio balance model.
• They consider two forms of currency substitution: partial dollarization (use of foreign currency in financial portfolios) and dollarization (replacement of national currency with the dollar as legal tender).
• They employ logistic regression and Markov transition probabilities to analyze the persistence of banking crises in the context of currency substitution.
• The model is based on the assumption of uncovered interest parity, and the authors test for endogeneity and stationarity of the demand for money.

Institutional Considerations

• Many Latin American countries have implemented restrictions on foreign currency deposits at different times.
• These restrictions are often imposed to maintain monetary control, preserve seigniorage, and protect the central bank's role in financial stability.
• The effectiveness of these policies varies, and currency substitution has continued to grow despite such measures.

Conclusion

• Currency substitution is a complex and persistent phenomenon in Latin America, influenced by inflation expectations, income levels, and institutional factors.
• It has significant macroeconomic implications, including increased volatility and reduced monetary independence.
• Banking crises are more likely and more severe in highly dollarized economies, and currency substitution can exacerbate the duration of such crises.
• The paper emphasizes the need for careful policy design to manage the risks associated with currency substitution, especially in the context of financial stability and monetary policy effectiveness.