Several years ago (June 2006) I wrote an article advancing a new theory of why the dollar is the world’s dominant currency and why it is likely to remain so. The article was published in the midst of the last boom and sank like a stone. But now debate about the cause of the dollar’s hegemony has been revived in an interesting paper by Fields and Vernengo titled “Hegemonic currencies during the crisis: The dollar versus the euro in a Cartelist perspective” (also here). Their paper provides an opportunity to revive discussion, so I am posting the article again. Here it is (subject to a couple of word edits):

The U.S. dollar is much in the news these days and there is a sense that the world economy may have become excessively reliant on the dollar. This reliance smacks of dysfunctional co-dependence whereby the U.S. and the rest of the world both rely on the dollar’s strength, but neither is well served by it.

The U.S. dollar is the world’s premiere currency, with approximately two-thirds of world official foreign exchange holdings being dollars. Moreover, many countries appear willing to run sustained trade surpluses with the U.S., supplying everything from t-shirts to Porsches in return for additional dollar holdings. This willingness to exchange valuable resources for paper IOUs represents a form of dollar tribute.

Many foreign policymakers complain about the U.S.’s special advantage, which allows it to run enormous trade deficits without apparent market sanction. Whereas balance of payments considerations constrain other countries to run tight economic policies, no equivalent constraint appears to hold for the United States. This advantage is rooted in the dollar’s special role as the world’s reserve currency.

For the U.S. one major benefit of the dollar’s reserve currency role is that it increases the demand for U.S. financial assets. This drives up prices of stocks and bonds and lowering interest rates, thereby increasing household wealth and lowering the cost of borrowing money. Additionally, the U.S. government gets seignorage (a free loan) from the hundreds of millions in dollar bills held offshore. Printing a one hundred dollar bill is almost costless to the U.S. government, but foreigners must give over one hundred dollars of resources to get the bill. That’s a tidy profit for U.S. taxpayers.

Increased foreign demand for U.S. assets also appreciates the dollar, which is a mixed blessing. On one hand, consumers benefit from lower import prices. On the other, it makes U.S manufacturing less internationally competitive because an over-valued dollar makes U.S. exports more expensive and imports cheaper. Reserve currency status therefore promotes trade deficits and de-industrialization.

The conventional explanation of the dollar’s reserve currency status is a “medium of exchange” story. The U.S. has historically been the largest and richest currency area, with the largest share of world output and trade. This has provided incentives for other countries to hold and use dollars. Additionally, the fact that many governments over-issue their own money and create high inflation, encourages foreign citizens to protect themselves by holding dollars instead of domestic currency.

A second theory of reserve currencies, associated with the political left, is based on U.S. military power and the Pax Americana. The argument is that U.S. military power provides the security that protects the global market system, and New York is the new Rome. Countries, such as Saudi Arabia, hold reserves in dollars because New York is a political safe haven, and because that is how they help cover the costs of enforcing the Pax Americana.

These two theories are mutually reinforcing. Thus, to the extent that the dollar is widely used and is also a safe haven, investors will tend to rush into dollars in times of uncertainty. Consequently, central banks in other countries need to accumulate large dollar reserve holdings to protect against financial disruptions that result from sudden exits by investors, as happened in East Asia in 1997.

There is a third unrecognized theory that can be labeled the “buyer of last resort” or Keynesian theory of reserve currencies. Put bluntly, the tribute other countries pay the U.S. through their trade surpluses is the result of their failure to generate adequate consumption spending in their own markets, be it due to poor income distribution or bad domestic economic policies. This forces them to rely on the American consumer.

The logic of this third theory is easily illustrated. Over the last decade, while Europe and Japan stagnated, the U.S. grew on the back of robust consumer spending. This spending has sucked in imports, helping growth in Europe, East Asia, and Latin America, and making the U.S. the major engine of global growth.

East Asian countries (especially China) have been particularly willing to run trade surpluses with the U.S. because this has fuelled export-led growth. These countries rely on exports to keep their factories operating. Export success then attracts foreign direct investment that advances development. Under-valued exchange rates are vital for this strategy as it keeps exports competitive. Countries have therefore channeled their trade surpluses into dollars, keeping the dollar over-valued and enabling them to sell in the U.S. market. This explains both the continuing strong demand for dollars despite the U.S. trade deficit, and the dollar’s dominance in official foreign exchange holdings.

Ironically, America’s dispensation from trade deficit discipline stems from other countries’ failure to develop an equivalent of the American consumer. Countries want to industrialize with full employment, but they lack adequate internal demand. Consequently, they must rely on the U.S. market. It is also why Germany supplies BMWs and Mercedes-Benzes in return for paper dollar IOUs.

Conventional theory says the dollar will only lose its dominance when countries become saturated with dollar holdings. At that stage they will cease buying and may even sell dollars, causing a fall of the dollar. The problem with this story is that countries have no incentive to sell dollars, as this would kill the golden goose of export-led growth.

The Keynesian theory of hegemonic currencies suggests a different take. One reason the dollar could topple is if countries finally manage to develop their own consumption markets. Euroland is most capable of doing this, but for the moment it is gripped by policymaking that is obsessed with inflation and afraid of growth. China needs to improve its income distribution in a way that links income distribution to productivity. Unions are the natural way to do this, but they are blocked by China’s totalitarian political system that fears unions.

An alternative source of collapse is if American consumers reduce spending because they feel over-extended, the Fed raises interest rates too high, or American banks tighten lending standards. In this event, the U.S. economy would stall and the dollar could fall owing to diminished U.S. economic prospects.

All three theories have merit, but in today’s economic environment the buyer of last resort theory is especially relevant. As long as other countries fail to generate sufficient demand in their own markets, they will be compelled to rely on the U.S. market and pay dollar tribute.

However, none are well served by this co-dependence. Other countries are resentful of the U.S.’s special situation that exempts it from trade deficit discipline. Side-by-side, U.S. long-term economic prospects are undermined by the erosion of the manufacturing sector, while U.S. workers face wage and job pressures from imports that are advantaged by the dollar’s over-valuation. Moreover, all are vulnerable to a sudden stop of the system resulting from financial over-extension of the U.S. consumer.

This suggests that the rest of the world needs to develop an alternative to the U.S. consumer. That will require raising wages in developing economies, and encouraging consumption in Europe and Japan. Such measures would stabilize the global economy by providing a second engine of growth, and it would also correct the large global financial imbalances that have developed as a result of over-reliance on the U.S. consumer.

This article was originally published by Yale Global Online as “Why Dollar Hegemony is Unhealthy.” Permission to re-publish and use can be obtained by e-mailing Yale Global at globalization@yale.edu.

 

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