WASHINGTON — For a number of economies around the world, the U.S. dollar is more than a foreign currency. It is a tool for economic stability, a means of restoring confidence and, in some cases, an alternative to a domestic monetary system that has struggled to maintain credibility.

Countries across Latin America, Asia and the Pacific have adopted the dollar under very different circumstances. Some turned to it after financial crises and extreme inflation, while others incorporated it into their economies as part of long-standing political or institutional arrangements.

The decision, however, comes with a fundamental trade-off: greater monetary stability in exchange for less control over national monetary policy.

Crisis Has Driven Some of the Most Dramatic Decisions

Economic turmoil has been a major catalyst for dollarization.

Ecuador adopted the U.S. dollar in 2000 after a severe banking and currency crisis undermined confidence in its domestic monetary system. The transition was intended to bring greater price stability and prevent further deterioration of the national currency.

El Salvador introduced the dollar in 2001, following a period of significant economic uncertainty. Over time, the U.S. currency became an important part of the country’s financial system.

These experiences demonstrate why governments facing persistent monetary instability may consider a foreign currency. When confidence in a domestic currency collapses, maintaining a national currency can become increasingly difficult and costly.

Panama Followed a Very Different Route

Panama represents a contrasting example.

The country has used the U.S. dollar as legal tender since 1904, while retaining the Balboa as its national monetary unit. The Balboa is maintained at a one-to-one value with the dollar.

Rather than adopting the dollar as an emergency response to hyperinflation, Panama’s monetary structure developed as part of its longer-term economic and financial system.

Dollarization Also Extends Across the Pacific

The dollar plays a central monetary role in several Pacific island economies.

Palau, the Federated States of Micronesia and the Marshall Islands use the U.S. currency under long-standing political and economic arrangements with the United States.

Timor-Leste adopted the U.S. dollar in 2000, choosing the currency during the early period of building its independent economic institutions.

For smaller economies, using an established international currency can provide practical advantages when maintaining an independent currency and monetary infrastructure would be difficult or expensive.

Zimbabwe Shows the Complexity of Partial Dollarization

Not every economy that heavily uses the dollar has completely abandoned its domestic currency.

Zimbabwe has experienced repeated episodes of extreme monetary instability, leading to extensive use of the U.S. dollar alongside domestic currency arrangements. The introduction of the Zimbabwe Gold (ZiG) has added another element to an already complex monetary environment.

Such systems demonstrate that dollarization can exist on a spectrum, ranging from complete replacement of a national currency to widespread use of the dollar alongside domestic money.

The Major Benefit: Monetary Credibility

The strongest argument for dollarization is stability.

Because the U.S. dollar is issued by the United States rather than the dollarized country’s own government, local authorities cannot simply expand the money supply to finance domestic spending.

This restriction can help prevent the kind of monetary expansion that contributes to severe inflation when fiscal and monetary institutions are weak.

Dollarization can also eliminate exchange-rate fluctuations between the local economy and the dollar, making certain international transactions more predictable.

For businesses, investors and households that already conduct substantial trade or savings in dollars, this can be particularly valuable.

But Monetary Independence Disappears

The same feature that provides discipline can become a major weakness.

A country using the U.S. dollar cannot independently devalue its currency to respond to economic shocks. It also cannot create its own currency to provide emergency liquidity in the same way that a country with a conventional central bank can.

Interest-rate policy is another limitation.

When the U.S. Federal Reserve changes monetary policy, dollarized economies are exposed to those changes even though their domestic economic conditions may be very different from those of the United States.

A higher U.S. interest-rate environment can therefore tighten financial conditions in countries whose economies may already be facing weak growth or other difficulties.

A Difficult Choice for Policymakers

Dollarization ultimately involves a fundamental economic calculation. Potential Advantage Corresponding Cost Greater protection against runaway inflation Loss of independent monetary policy Greater exchange-rate stability against the dollar No independent currency devaluation Increased confidence in the monetary system Limited ability to create emergency liquidity Easier dollar-based international transactions Exposure to U.S. monetary conditions Potentially stronger investor confidence Reduced control over domestic monetary responses

For economies with a history of severe inflation or currency crises, these costs may be considered acceptable when compared with the damage caused by continued monetary instability.

However, dollarization does not eliminate economic risk. Instead, it changes the nature of that risk.

A government that controls its own currency has greater flexibility but also greater responsibility for maintaining monetary credibility. A dollarized government sacrifices much of that flexibility in return for the stability associated with an internationally trusted currency.

As global economies confront inflation, changing interest rates and financial shocks, the experiences of dollarized nations offer an important lesson: monetary sovereignty can be valuable, but for some countries, economic credibility and price stability can be judged even more valuable than control over the printing press.