Chapter 15 Net Exports and International Finance

The Case for Trade

International trade increases the quantity of goods and services available to the world’s consumers. By allocating resources according to the principle of comparative advantage, trade allows nations to consume combinations of goods and services they would be unable to produce on their own, combinations that lie outside each country’s production possibilities curve.

A country has a comparative advantage in the production of a good if it can produce that good at a lower opportunity cost than can other countries. If each country specializes in the production of goods in which it has a comparative advantage and trades those goods for things in which other countries have a comparative advantage, global production of all goods and services will be increased. The result can be higher levels of consumption for all.

If international trade allows expanded world production of goods and services, it follows that restrictions on trade will reduce world production. That, in a nutshell, is the economic case for free trade. It suggests that restrictions on trade, such as a tariffA tax imposed on imported goods and services., a tax imposed on imported goods and services, or a quotaA ceiling on the quantity of specific goods and services that can be imported, which reduces world living standards., a ceiling on the quantity of specific goods and services that can be imported, reduce world living standards.

The conceptual argument for free trade is a compelling one; virtually all economists support policies that reduce barriers to trade. Economists were among the most outspoken advocates for the 1993 ratification of the North American Free Trade Agreement (NAFTA), which virtually eliminated trade restrictions between Mexico, the United States, and Canada, and the 2004 Central American Free Trade Agreement (CAFTA), which did the same for trade between the United States, Central America, and the Dominican Republic. Most economists have also been strong supporters of worldwide reductions in trade barriers, including the 1994 ratification of the General Agreement on Tariffs and Trade (GATT), a pact slashing tariffs and easing quotas among 117 nations, including the United States, and the Doha round of World Trade Organization negotiations, named after the site of the first meeting in Doha, Qatar, in 2001 and still continuing. In Europe, member nations of the European Union (EU) have virtually eliminated trade barriers among themselves, and 15 EU nations now have a common currency, the euro, and a single central bank, the European Central Bank, established in 1999. Trade barriers have also been slashed among the economies of Latin America and of Southeast Asia. A treaty has been signed that calls for elimination of trade barriers among the developed nations of the Pacific Rim (including the United States and Japan) by 2010 and among all Pacific rim nations by 2020.

The global embrace of the idea of free trade demonstrates the triumph of economic ideas over powerful forces that oppose free trade. One source of opposition to free trade comes from the owners of factors of production used in industries in which a nation lacks a comparative advantage.

A related argument against free trade is that it not only reduces employment in some sectors but also reduces employment in the economy as a whole. In the long run, this argument is clearly wrong. The economy’s natural level of employment is determined by forces unrelated to trade policy, and employment moves to its natural level in the long run.

Further, trade has no effect on real wage levels for the economy as a whole. The equilibrium real wage depends on the economy’s demand for and supply curve of labor. Trade affects neither.

In the short run, trade does affect aggregate demand. Net exports are one component of aggregate demand; a change in net exports shifts the aggregate demand curve and affects real GDP in the short run. All other things unchanged, a reduction in net exports reduces aggregate demand, and an increase in net exports increases it.

Protectionist sentiment always rises during recessions. The recession that began in the United States in 2007 is no exception. The stimulus bill contained a provision ordering U.S. government agencies and contractors to purchase goods and services produced in the United States in preference to goods and services from other countries. Our trading partners have already begun threatening a trade war as a result of this provision. The stimulus bill does say that the “buy America first” provision should be “consistent with international obligations.” As yet, it is not clear how significant this provision would become.

The Rising Importance of International Trade

International trade is important, and its importance is increasing. From 1965 to 2007, world output rose by about 300%. But the gains in total exports were even more spectacular; they soared by over 1,000%!

While international trade was rising around the world, it was playing a more significant role in the United States as well. In 1960, exports represented just 3.5% of real GDP; by 2010, exports accounted for 12.6% of real GDP. Figure 15.1 "U.S. Exports and Imports Relative to U.S. Real GDP, 1960–2010" shows the growth in exports and imports as a percentage of real GDP in the United States from 1960 to 2010.

Why has world trade risen so spectacularly? Two factors have been important. First, advances in transportation and communication have dramatically reduced the costs of moving goods around the globe. The development of shipping containerization that allows cargo to be moved seamlessly from trucks or trains to ships, which began in 1956, drastically reduced the cost of moving goods around the world, by as much as 90%. As a result, the numbers of container ships and their capacities have markedly increased.For an interesting history of this remarkable development, see Marc Levinson, The Box: How the Shipping Container Made the World Smaller and the World Economy Bigger (Princeton: Princeton University Press, 2006). Second, we have already seen that trade barriers between countries have fallen and are likely to continue to fall.

Figure 15.1 U.S. Exports and Imports Relative to U.S. Real GDP, 1960–2010

The chart shows exports and imports as a percentage of real GDP from 1960 through the third quarter of 2010.

Source: Bureau of Economic Analysis, NIPA Table 1.1.6 (Revised November 23, 2010). Data are through the third quarter of 2010.

Net Exports and the Economy

As trade has become more important worldwide, exports and imports have assumed increased importance in nearly every country on the planet. We have already discussed the increased shares of U.S. real GDP represented by exports and by imports. We will find in this section that the economy both influences, and is influenced by, net exports. First, we will examine the determinants of net exports and then discuss the ways in which net exports affect aggregate demand.

Determinants of Net Exports

Net exports equal exports minus imports. Many of the same forces affect both exports and imports, albeit in different ways.

Income

As incomes in other nations rise, the people of those nations will be able to buy more goods and services—including foreign goods and services. Any one country’s exports thus will increase as incomes rise in other countries and will fall as incomes drop in other countries.

A nation’s own level of income affects its imports the same way it affects consumption. As consumers have more income, they will buy more goods and services. Because some of those goods and services are produced in other nations, imports will rise. An increase in real GDP thus boosts imports; a reduction in real GDP reduces imports. Figure 15.2 "U.S. Real GDP and Imports, 1960–2010" shows the relationship between real GDP and the real level of import spending in the United States from 1960 through 2010. Notice that the observations lie close to a straight line one could draw through them and resemble a consumption function.

Figure 15.2 U.S. Real GDP and Imports, 1960–2010

The chart shows annual values of U.S. real imports and real GDP from 1960 through 2010. The observations lie quite close to a straight line.

Source: Bureau of Economic Analysis, NIPA Table 1.1.6 (Revised November 23, 2010). Data are through the third quarter of 2010.

Relative Prices

A change in the price level within a nation simultaneously affects exports and imports. A higher price level in the United States, for example, makes U.S. exports more expensive for foreigners and thus tends to reduce exports. At the same time, a higher price level in the United States makes foreign goods and services relatively more attractive to U.S. buyers and thus increases imports. A higher price level therefore reduces net exports. A lower price level encourages exports and reduces imports, increasing net exports. As we saw in the chapter that introduced the aggregate demand and supply model, the negative relationship between net exports and the price level is called the international trade effect and is one reason for the negative slope of the aggregate demand curve.

The Exchange Rate

The purchase of U.S. goods and services by foreign buyers generally requires the purchase of dollars, because U.S. suppliers want to be paid in their own currency. Similarly, purchases of foreign goods and services by U.S. buyers generally require the purchase of foreign currencies, because foreign suppliers want to be paid in their own currencies. An increase in the exchange rate means foreigners must pay more for dollars, and must thus pay more for U.S. goods and services. It therefore reduces U.S. exports. At the same time, a higher exchange rate means that a dollar buys more foreign currency. That makes foreign goods and services cheaper for U.S. buyers, so imports are likely to rise. An increase in the exchange rate should thus tend to reduce net exports. A reduction in the exchange rate should increase net exports.

Trade Policies

A country’s exports depend on its own trade policies as well as the trade policies of other countries. A country may be able to increase its exports by providing some form of government assistance (such as special tax considerations for companies that export goods and services, government promotional efforts, assistance with research, or subsidies). A country’s exports are also affected by the degree to which other countries restrict or encourage imports. The United States, for example, has sought changes in Japanese policies toward products such as U.S.-grown rice. Japan banned rice imports in the past, arguing it needed to protect its own producers. That has been a costly strategy; consumers in Japan typically pay as much as 10 times the price consumers in the United States pay for rice. Japan has given in to pressure from the United States and other nations to end its ban on foreign rice as part of the GATT accord. That will increase U.S. exports and lower rice prices in Japan.

Similarly, a country’s imports are affected by its trade policies and by the policies of its trading partners. A country can limit its imports of some goods and services by imposing tariffs or quotas on them—it may even ban the importation of some items. If foreign governments subsidize the manufacture of a particular good, then domestic imports of the good might increase. For example, if the governments of countries trading with the United States were to subsidize the production of steel, then U.S. companies would find it cheaper to purchase steel from abroad than at home, increasing U.S. imports of steel.

Preferences and Technology

Consumer preferences are one determinant of the consumption of any good or service; a shift in preferences for a foreign-produced good will affect the level of imports of that good. The preference among the French for movies and music produced in the United States has boosted French imports of these services. Indeed, the shift in French preferences has been so strong that the government of France, claiming a threat to its cultural heritage, has restricted the showing of films produced in the United States. French radio stations are fined if more than 40% of the music they play is from “foreign” (in most cases, U.S.) rock groups.

Changes in technology can affect the kinds of capital firms import. Technological changes have changed production worldwide toward the application of computers to manufacturing processes, for example. This has led to increased demand for high-tech capital equipment, a sector in which the United States has a comparative advantage and tends to dominate world production. This has boosted net exports in the United States.

Net Exports and Aggregate Demand

Net exports affect both the slope and the position of the aggregate demand curve. A change in the price level causes a change in net exports that moves the economy along its aggregate demand curve. This is the international trade effect. A change in net exports produced by one of the other determinants of net exports listed above (incomes and price levels in other nations, the exchange rate, trade policies, and preferences and technology) will shift the aggregate demand curve. The magnitude of this shift equals the change in net exports times the multiplier, as shown in Figure 15.3 "Changes in Net Exports and Aggregate Demand". Panel (a) shows an increase in net exports; Panel (b) shows a reduction. In both cases, the aggregate demand curve shifts by the multiplier times the initial change in net exports, provided there is no other change in the other components of aggregate demand.

Figure 15.3 Changes in Net Exports and Aggregate Demand

In Panel (a), an increase in net exports shifts the aggregate demand curve to the right by an amount equal to the multiplier times the initial change in net exports. In Panel (b), an equal reduction in net exports shifts the aggregate demand curve to the left by the same amount.

Changes in net exports that shift the aggregate demand curve can have a significant impact on the economy. The United States, for example, experienced a slowdown in the rate of increase in real GDP in the second and third quarters of 1998—virtually all of this slowing was the result of a reduction in net exports caused by recessions that staggered economies throughout Asia. The Asian slide reduced incomes there and thus reduced Asian demand for U.S. goods and services. We will see in the next section another mechanism through which difficulties in other nations can cause changes in a nation’s net exports and its level of real GDP in the short run.

Key Takeaways

• International trade allows the world’s resources to be allocated on the basis of comparative advantage and thus allows the production of a larger quantity of goods and services than would be available without trade.
• Trade affects neither the economy’s natural level of employment nor its real wage in the long run; those are determined by the demand for and the supply curve of labor.
• Growth in international trade has outpaced growth in world output over the past five decades.
• The chief determinants of net exports are domestic and foreign incomes, relative price levels, exchange rates, domestic and foreign trade policies, and preferences and technology.
• A change in the price level causes a change in net exports that moves the economy along its aggregate demand curve. This is the international trade effect. A change in net exports produced by one of the other determinants of net exports will shift the aggregate demand curve by an amount equal to the initial change in net exports times the multiplier.

Try It!

Draw graphs showing the aggregate demand and short-run aggregate supply curves in each of four countries: Mexico, Japan, Germany, and the United States. Assume that each country is initially in equilibrium with a real GDP of Y₁ and a price level of P₁. Now show how each of the following four events would affect aggregate demand, the price level, and real GDP in the country indicated.

1. The United States is the largest foreign purchaser of goods and services from Mexico. How does an expansion in the United States affect real GDP and the price level in Mexico?
2. Japan’s exchange rate falls sharply. How does this affect the price level and real GDP in Japan?
3. A wave of pro-German sentiment sweeps France, and the French sharply increase their purchases of German goods and services. How does this affect real GDP and the price level in Germany?
4. Canada, the largest importer of U.S. goods and services, slips into a recession. How does this affect the price level and real GDP in the United States?

Case in Point: Canadian Net Exports Survive the Loonie’s Rise

Figure 15.4

Throughout 2003 and the first half of 2004, the Canadian dollar, nicknamed the loonie after the Canadian bird that is featured on its one-dollar coin, rose sharply in value against the U.S. dollar. Because the United States and Canada are major trading partners, the changing exchange rate suggested that, other things equal, Canadian exports to the United States would fall and imports rise. The resulting fall in net exports, other things equal, could slow the rate of growth in Canadian GDP.

Fortunately for Canada, “all other things” were not equal. In particular, strong income growth in the United States and China increased the demand for Canadian exports. In addition, the loonie’s appreciation against other currencies was less dramatic, and so Canadian exports remained competitive in those markets. While imports did increase, as expected due to the exchange rate change, exports grew at a faster rate, and hence net exports increased over the period.

In sum, Canadian net exports grew, although not by as much as they would have had the loonie not appreciated. As Beata Caranci, an economist for Toronto Dominion Bank put it, “We might have some bumpy months ahead but it definitely looks like the worst is over. … While Canadian exports appear to have survived the loonie’s run-up, their fortunes would be much brighter if the exchange rate were still at 65 cents.”

Source: Steven Theobald, “Exports Surviving Loonie’s Rise: Study,” Toronto Star, July 13, 2004, p. D1.

Answers to Try It! Problems

1. Mexico’s exports increase, shifting its aggregate demand curve to the right. Mexico’s real GDP and price level rise, as shown in Panel (a).
2. Japan’s net exports rise. This event shifts Japan’s aggregate demand curve to the right, increasing its real GDP and price level, as shown in Panel (b).
3. Germany’s net exports increase, shifting Germany’s aggregate demand curve to the right, increasing its price level and real GDP, as shown in Panel (c).
4. U.S. exports fall, shifting the U.S. aggregate demand curve to the left, which will reduce the price level and real GDP, as shown in Panel (d).

Figure 15.5

Accounting for International Payments

In this section, we will build a set of accounts to track international payments. To do this, we will use the equilibrium condition for foreign exchange markets given in Equation 15.2. We will see that the balance between a country’s purchases of foreign assets and foreign purchases of the country’s assets will have important effects on net exports, and thus on aggregate demand.

We can rearrange the terms in Equation 15.2 to write the following:

Equation 15.3 represents an extremely important relationship. Let us examine it carefully.

The left side of the equation is net exports. It is the balance between spending flowing from foreign countries into a particular country for the purchase of its goods and services and spending flowing out of the country for the purchase of goods and services produced in other countries. The current accountAn accounting statement that includes all spending flows across a nation’s border except those that represent purchases of assets. is an accounting statement that includes all spending flows across a nation’s border except those that represent purchases of assets. The balance on current accountSpending flowing into an economy from the rest of the world on current account less spending flowing from the nation to the rest of the world on current account. equals spending flowing into an economy from the rest of the world on current account less spending flowing from the nation to the rest of the world on current account. Given our two simplifying assumptions—that there are no international transfer payments and that we can treat rest-of-world purchases of domestic factor services as exports and domestic purchases of rest-of-world factor services as imports—the balance on current account equals net exports. When the balance on current account is positive, spending flowing in for the purchase of goods and services exceeds spending that flows out, and the economy has a current account surplusSituation that occurs when spending flowing in for the purchase of goods and services exceeds spending that flows out. (i.e., net exports are positive in our simplified analysis). When the balance on current account is negative, spending for goods and services that flows out of the country exceeds spending that flows in, and the economy has a current account deficitSituation that occurs when spending for goods and services that flows out of the country exceeds spending that flows in. (i.e., net exports are negative in our simplified analysis).

A country’s capital accountAn accounting statement of spending flows into and out of the country during a particular period for purchases of assets. is an accounting statement of spending flows into and out of the country during a particular period for purchases of assets. The term within the parentheses on the right side of the equation gives the balance between rest-of-world purchases of domestic assets and domestic purchases of rest-of-world assets; this balance is a country’s balance on capital accountThe balance between rest-of-world purchases of domestic assets and domestic purchases of rest-of-world assets.. A positive balance on capital account is a capital account surplusA positive balance on capital account.. A capital account surplus means that buyers in the rest of the world are purchasing more of a country’s assets than buyers in the domestic economy are spending on rest-of-world assets. A negative balance on capital account is a capital account deficitA negative balance on capital account.. It implies that buyers in the domestic economy are purchasing a greater volume of assets in other countries than buyers in other countries are spending on the domestic economy’s assets. Remember that the balance on capital account is the term inside the parentheses on the right-hand side of Equation 15.3 and that there is a minus sign outside the parentheses.

Equation 15.3 tells us that a country’s balance on current account equals the negative of its balance on capital account. Suppose, for example, that buyers in the rest of the world are spending $100 billion per year acquiring assets in a country, while that country’s buyers are spending $70 billion per year to acquire assets in the rest of the world. The country thus has a capital account surplus of $30 billion per year. Equation 15.3 tells us the country must have a current account deficit of $30 billion per year.

Alternatively, suppose buyers from the rest of the world acquire $25 billion of a country’s assets per year and that buyers in that country buy $40 billion per year in assets in other countries. The economy has a capital account deficit of $15 billion; its capital account balance equals −$15 billion. Equation 15.3 tells us it thus has a current account surplus of $15 billion. In general, we may write the following:

Assuming the market for a nation’s currency is in equilibrium, a capital account surplus necessarily means a current account deficit. A capital account deficit necessarily means a current account surplus. Similarly, a current account surplus implies a capital account deficit; a current account deficit implies a capital account surplus. Whenever the market for a country’s currency is in equilibrium, and it virtually always is in the absence of exchange rate controls, Equation 15.3 is an identity—it must be true. Thus, any surplus or deficit in the current account means the capital account has an offsetting deficit or surplus.

The accounting relationships underlying international finance hold as long as a country’s currency market is in equilibrium. But what are the economic forces at work that cause these equalities to hold? Consider how global turmoil in 1997 and 1998, discussed in the chapter opening, affected the United States. Holders of assets, including foreign currencies, in the rest of the world were understandably concerned that the values of those assets might fall. To avoid a plunge in the values of their own holdings, many of them purchased U.S. assets, including U.S. dollars. Those purchases of U.S. assets increased the U.S. surplus on capital account. To buy those assets, foreign purchasers had to purchase dollars. Also, U.S. citizens became less willing to hold foreign assets, and their preference for holding U.S. assets increased. United States citizens were thus less willing to supply dollars to the foreign exchange market. The increased demand for dollars and the decreased supply of dollars sent the U.S. exchange rate higher, as shown in Panel (a) of Figure 15.6 "A Change in the Exchange Rate Affected the U.S. Current and Capital Accounts in 1997 and 1998". Panel (b) shows the actual movement of the U.S. exchange rate in 1997 and 1998. Notice the sharp increases in the exchange rate throughout most of the period. A higher exchange rate in the United States reduces U.S. exports and increases U.S. imports, increasing the current account deficit. Panel (c) shows the movement of the current and capital accounts in the United States in 1997 and 1998. Notice that as the capital account surplus increased, the current account deficit rose. A reduction in the U.S. exchange rate at the end of 1998 coincided with a movement of these balances in the opposite direction.

Figure 15.6 A Change in the Exchange Rate Affected the U.S. Current and Capital Accounts in 1997 and 1998

Turmoil in currency markets all over the world in 1997 and 1998 increased the demand for dollars and decreased the supply of dollars in the foreign exchange market, which caused an increase in the U.S. exchange rate, as shown in Panel (a). Panel (b) shows actual values of the U.S. exchange rate during that period; Panel (c) shows U.S. balances on current and on capital accounts. Notice that the balance on capital account generally rose while the balance on current account generally fell.

Deficits and Surpluses: Good or Bad?

For the past quarter century, the United States has had a current account deficit and a capital account surplus. Is this good or bad?

Viewed from the perspective of consumers, neither phenomenon seems to pose a problem. A current account deficit is likely to imply a trade deficit. That means more goods and services are flowing into the country than are flowing out. A capital account surplus means more spending is flowing into the country for the purchase of assets than is flowing out. It is hard to see the harm in any of that.

Public opinion, however, appears to regard a current account deficit and capital account surplus as highly undesirable, perhaps because people associate a trade deficit with a loss of jobs. But that is erroneous; employment in the long run is determined by forces that have nothing to do with a trade deficit. An increase in the trade deficit (that is, a reduction in net exports) reduces aggregate demand in the short run, but net exports are only one component of aggregate demand. Other factors—consumption, investment, and government purchases—affect aggregate demand as well. There is no reason a trade deficit should imply a loss of jobs.

What about foreign purchases of U.S. assets? One objection to such purchases is that if foreigners own U.S. assets, they will receive the income from those assets—spending will flow out of the country. But it is hard to see the harm in paying income to financial investors. When someone buys a bond issued by Microsoft, interest payments will flow from Microsoft to the bond holder. Does Microsoft view the purchase of its bond as a bad thing? Of course not. Despite the fact that Microsoft’s payment of interest on the bond and the ultimate repayment of the face value of the bond will exceed what the company originally received from the bond purchaser, Microsoft is surely not unhappy with the arrangement. It expects to put that money to more productive use; that is the reason it issued the bond in the first place.

A second concern about foreign asset purchases is that the United States in some sense loses sovereignty when foreigners buy its assets. But why should this be a problem? Foreign-owned firms competing in U.S. markets are at the mercy of those markets, as are firms owned by U.S. nationals. Foreign owners of U.S. real estate have no special power. What about foreign buyers of bonds issued by the U.S. government? Foreigners owned about 28% of these bonds at the end of September 2008; they are thus the creditors for about 28% of the national debt. But this position hardly puts them in control of the government of the United States. They hold an obligation of the U.S. government to pay them a certain amount of U.S. dollars on a certain date, nothing more. A foreign owner could sell his or her bonds, but more than $100 billion worth of these bonds are sold every day. The resale of U.S. bonds by a foreign owner will not affect the U.S. government.

In short, there is no economic justification for concern about having a current account deficit and a capital account surplus—nor would there be an economic reason to be concerned about the opposite state of affairs. The important feature of international trade is its potential to improve living standards for people. It is not a game in which current account balances are the scorecard.

Case in Point: Alan Greenspan on the U.S. Current Account Deficit

Figure 15.7

The growing U.S. current account deficit has generated considerable alarm. But, is there cause for alarm? In a speech in December 2005, former Federal Reserve Chairman Alan Greenspan analyzed what he feels are the causes of the growing deficit and explains how the U.S. current account deficit may, under certain circumstances, decrease over time without a crisis.

“In November 2003, I noted that we saw little evidence of stress in funding the U.S. current account deficit even though the real exchange rate for the dollar, on net, had declined more than 10% since early 2002. … Two years later, little has changed except that our current account deficit has grown still larger. Most policy makers marvel at the seeming ease with which the United States continues to finance its current account deficit.

“Of course, deficits that cumulate to ever-increasing net external debt, with its attendant rise in servicing costs, cannot persist indefinitely. At some point, foreign investors will balk at a growing concentration of claims against U.S. residents … and will begin to alter their portfolios. … The rise of the U.S. current account deficit over the past decade appears to have coincided with a pronounced new phase of globalization that is characterized by a major acceleration in U.S. productivity growth and the decline in what economists call home bias. In brief, home bias is the parochial tendency of persons, though faced with comparable or superior foreign opportunities, to invest domestic savings in the home country. The decline in home bias is reflected in savers increasingly reaching across national borders to invest in foreign assets. The rise in U.S. productivity attracted much of those savings toward investments in the United States. …

“Accordingly, it is tempting to conclude that the U.S. current account deficit is essentially a byproduct of long-term secular forces, and thus is largely benign. After all, we do seem to have been able to finance our international current account deficit with relative ease in recent years.

“But does the apparent continued rise in the deficits of U.S. individual households and nonfinancial businesses themselves reflect growing economic strain? (We do not think so.) And does it matter how those deficits of individual economic entities are being financed? Specifically, does the recent growing proportion of these deficits being financed, net, by foreigners matter? …

“If the currently disturbing drift toward protectionism is contained and markets remain sufficiently flexible, changing terms of trade, interest rates, asset prices, and exchange rates will cause U.S. saving to rise, reducing the need for foreign finance, and reversing the trend of the past decade toward increasing reliance on it. If, however, the pernicious drift toward fiscal instability in the United States and elsewhere is not arrested and is compounded by a protectionist reversal of globalization, the adjustment process could be quite painful for the world economy.”

Source: Alan Greenspan, “International Imbalances” (speech, Advancing Enterprise Conference, London, England, December 2, 2005), available at http://www.federalreserve.gov/boarddocs/speeches/2005/200512022/default.htm.

Free-Floating Systems

In a free-floating exchange rate systemSystem in which governments and central banks do not participate in the market for foreign exchange., governments and central banks do not participate in the market for foreign exchange. The relationship between governments and central banks on the one hand and currency markets on the other is much the same as the typical relationship between these institutions and stock markets. Governments may regulate stock markets to prevent fraud, but stock values themselves are left to float in the market. The U.S. government, for example, does not intervene in the stock market to influence stock prices.

The concept of a completely free-floating exchange rate system is a theoretical one. In practice, all governments or central banks intervene in currency markets in an effort to influence exchange rates. Some countries, such as the United States, intervene to only a small degree, so that the notion of a free-floating exchange rate system comes close to what actually exists in the United States.

A free-floating system has the advantage of being self-regulating. There is no need for government intervention if the exchange rate is left to the market. Market forces also restrain large swings in demand or supply. Suppose, for example, that a dramatic shift in world preferences led to a sharply increased demand for goods and services produced in Canada. This would increase the demand for Canadian dollars, raise Canada’s exchange rate, and make Canadian goods and services more expensive for foreigners to buy. Some of the impact of the swing in foreign demand would thus be absorbed in a rising exchange rate. In effect, a free-floating exchange rate acts as a buffer to insulate an economy from the impact of international events.

The primary difficulty with free-floating exchange rates lies in their unpredictability. Contracts between buyers and sellers in different countries must not only reckon with possible changes in prices and other factors during the lives of those contracts, they must also consider the possibility of exchange rate changes. An agreement by a U.S. distributor to purchase a certain quantity of Canadian lumber each year, for example, will be affected by the possibility that the exchange rate between the Canadian dollar and the U.S. dollar will change while the contract is in effect. Fluctuating exchange rates make international transactions riskier and thus increase the cost of doing business with other countries.

Managed Float Systems

Governments and central banks often seek to increase or decrease their exchange rates by buying or selling their own currencies. Exchange rates are still free to float, but governments try to influence their values. Government or central bank participation in a floating exchange rate system is called a managed floatGovernment or central bank participation in a floating exchange rate system..

Countries that have a floating exchange rate system intervene from time to time in the currency market in an effort to raise or lower the price of their own currency. Typically, the purpose of such intervention is to prevent sudden large swings in the value of a nation’s currency. Such intervention is likely to have only a small impact, if any, on exchange rates. Roughly $1.5 trillion worth of currencies changes hands every day in the world market; it is difficult for any one agency—even an agency the size of the U.S. government or the Fed—to force significant changes in exchange rates.

Still, governments or central banks can sometimes influence their exchange rates. Suppose the price of a country’s currency is rising very rapidly. The country’s government or central bank might seek to hold off further increases in order to prevent a major reduction in net exports. An announcement that a further increase in its exchange rate is unacceptable, followed by sales of that country’s currency by the central bank in order to bring its exchange rate down, can sometimes convince other participants in the currency market that the exchange rate will not rise further. That change in expectations could reduce demand for and increase supply of the currency, thus achieving the goal of holding the exchange rate down.

Fixed Exchange Rates

In a fixed exchange rate systemSystem in which the exchange rate between two currencies is set by government policy., the exchange rate between two currencies is set by government policy. There are several mechanisms through which fixed exchange rates may be maintained. Whatever the system for maintaining these rates, however, all fixed exchange rate systems share some important features.

Fixed Exchange Rates Through Intervention

The Bretton Woods Agreement called for each currency’s value to be fixed relative to other currencies. The mechanism for maintaining these rates, however, was to be intervention by governments and central banks in the currency market.

Again suppose that the exchange rate between the dollar and the British pound is fixed at $4 per £1. Suppose further that this rate is an equilibrium rate, as illustrated in Figure 15.8 "Maintaining a Fixed Exchange Rate Through Intervention". As long as the fixed rate coincides with the equilibrium rate, the fixed exchange rate operates in the same fashion as a free-floating rate.

Figure 15.8 Maintaining a Fixed Exchange Rate Through Intervention

Initially, the equilibrium price of the British pound equals $4, the fixed rate between the pound and the dollar. Now suppose an increased supply of British pounds lowers the equilibrium price of the pound to $3. The Bank of England could purchase pounds by selling dollars in order to shift the demand curve for pounds to D₂. Alternatively, the Fed could shift the demand curve to D₂ by buying pounds.

Now suppose that the British choose to purchase more U.S. goods and services. The supply curve for pounds increases, and the equilibrium exchange rate for the pound (in terms of dollars) falls to, say, $3. Under the terms of the Bretton Woods Agreement, Britain and the United States would be required to intervene in the market to bring the exchange rate back to the rate fixed in the agreement, $4. If the adjustment were to be made by the British central bank, the Bank of England, it would have to purchase pounds. It would do so by exchanging dollars it had previously acquired in other transactions for pounds. As it sold dollars, it would take in checks written in pounds. When a central bank sells an asset, the checks that come into the central bank reduce the money supply and bank reserves in that country. We saw in the chapter explaining the money supply, for example, that the sale of bonds by the Fed reduces the U.S. money supply. Similarly, the sale of dollars by the Bank of England would reduce the British money supply. In order to bring its exchange rate back to the agreed-to level, Britain would have to carry out a contractionary monetary policy.

Alternatively, the Fed could intervene. It could purchase pounds, writing checks in dollars. But when a central bank purchases assets, it adds reserves to the system and increases the money supply. The United States would thus be forced to carry out an expansionary monetary policy.

Domestic disturbances created by efforts to maintain fixed exchange rates brought about the demise of the Bretton Woods system. Japan and West Germany gave up the effort to maintain the fixed values of their currencies in the spring of 1971 and announced they were withdrawing from the Bretton Woods system. President Richard Nixon pulled the United States out of the system in August of that year, and the system collapsed. An attempt to revive fixed exchange rates in 1973 collapsed almost immediately, and the world has operated largely on a managed float ever since.

Under the Bretton Woods system, the United States had redeemed dollars held by other governments for gold; President Nixon terminated that policy as he withdrew the United States from the Bretton Woods system. The dollar is no longer backed by gold.

Fixed exchange rate systems offer the advantage of predictable currency values—when they are working. But for fixed exchange rates to work, the countries participating in them must maintain domestic economic conditions that will keep equilibrium currency values close to the fixed rates. Sovereign nations must be willing to coordinate their monetary and fiscal policies. Achieving that kind of coordination among independent countries can be a difficult task.

The fact that coordination of monetary and fiscal policies is difficult does not mean it is impossible. Eleven members of the European Union not only agreed to fix their exchange rates to one another, they agreed to adopt a common currency, the euro. The new currency was introduced in 1998 and became fully adopted in 1999. Since then, four other nations have joined. The nations that have adopted it have agreed to strict limits on their fiscal policies. Each will continue to have its own central bank, but these national central banks will operate similarly to the regional banks of the Federal Reserve System in the United States. The new European Central Bank will conduct monetary policy throughout the area. Details of this revolutionary venture are provided in the accompanying Case in Point.

When exchange rates are fixed but fiscal and monetary policies are not coordinated, equilibrium exchange rates can move away from their fixed levels. Once exchange rates start to diverge, the effort to force currencies up or down through market intervention can be extremely disruptive. And when countries suddenly decide to give that effort up, exchange rates can swing sharply in one direction or another. When that happens, the main virtue of fixed exchange rates, their predictability, is lost.

Thailand’s experience with the baht illustrates the potential difficulty with attempts to maintain a fixed exchange rate. Thailand’s central bank had held the exchange rate between the dollar and the baht steady, at a price for the baht of $0.04. Several factors, including weakness in the Japanese economy, reduced the demand for Thai exports and thus reduced the demand for the baht, as shown in Panel (a) of Figure 15.9 "The Anatomy of a Currency Collapse". Thailand’s central bank, committed to maintaining the price of the baht at $0.04, bought baht to increase the demand, as shown in Panel (b). Central banks buy their own currency using their reserves of foreign currencies. We have seen that when a central bank sells bonds, the money supply falls. When it sells foreign currency, the result is no different. Sales of foreign currency by Thailand’s central bank in order to purchase the baht thus reduced Thailand’s money supply and reduced the bank’s holdings of foreign currencies. As currency traders began to suspect that the bank might give up its effort to hold the baht’s value, they sold baht, shifting the supply curve to the right, as shown in Panel (c). That forced the central bank to buy even more baht—selling even more foreign currency—until it finally gave up the effort and allowed the baht to become a free-floating currency. By the end of 1997, the baht had lost nearly half its value relative to the dollar.

Figure 15.9 The Anatomy of a Currency Collapse

Weakness in the Japanese economy, among other factors, led to a reduced demand for the baht (Panel [a]). That put downward pressure on the baht’s value relative to other currencies. Committed to keeping the price of the baht at $0.04, Thailand’s central bank bought baht to increase the demand, as shown in Panel (b). However, as holders of baht and other Thai assets began to fear that the central bank might give up its effort to prop up the baht, they sold baht, shifting the supply curve for baht to the right (Panel [c]) and putting more downward pressure on the baht’s price. Finally, in July of 1997, the central bank gave up its effort to prop up the currency. By the end of the year, the baht’s dollar value had fallen to about $0.02.

As we saw in the introduction to this chapter, the plunge in the baht was the first in a chain of currency crises that rocked the world in 1997 and 1998. International trade has the great virtue of increasing the availability of goods and services to the world’s consumers. But financing trade—and the way nations handle that financing—can create difficulties.

Key Takeaways

• In a free-floating exchange rate system, exchange rates are determined by demand and supply.
• Exchange rates are determined by demand and supply in a managed float system, but governments intervene as buyers or sellers of currencies in an effort to influence exchange rates.
• In a fixed exchange rate system, exchange rates among currencies are not allowed to change. The gold standard and the Bretton Woods system are examples of fixed exchange rate systems.

Try It!

Suppose a nation’s central bank is committed to holding the value of its currency, the mon, at $2 per mon. Suppose further that holders of the mon fear that its value is about to fall and begin selling mon to purchase U.S. dollars. What will happen in the market for mon? Explain your answer carefully, and illustrate it using a demand and supply graph for the market for mon. What action will the nation’s central bank take? Use your graph to show the result of the central bank’s action. Why might this action fuel concern among holders of the mon about its future prospects? What difficulties will this create for the nation’s central bank?

Case in Point: The Euro

Figure 15.10

It marks the most dramatic development in international finance since the collapse of the Bretton Woods system. A new currency, the euro, began trading among 11 European nations—Austria, Belgium, Finland, France, Germany, Ireland, Italy, Luxembourg, the Netherlands, Portugal, and Spain—in 1999. During a three-year transition, each nation continued to have its own currency, which traded at a fixed rate with the euro. In 2002, the currencies of the participant nations disappeared altogether and were replaced by the euro. In 2007, Slovenia adopted the euro, as did Cyprus and Malta in 2008 and Slovakia in 2009. Several other countries are also hoping to join. Notable exceptions are Britain, Sweden, Switzerland, and Denmark. Still, most of Europe now operates as the ultimate fixed exchange rate regime, a region with a single currency.

To participate in this radical experiment, the nations switching to the euro had to agree to give up considerable autonomy in monetary and fiscal policy. While each nation continues to have its own central bank, those central banks operate more like regional banks of the Federal Reserve System in the United States; they have no authority to conduct monetary policy. That authority is vested in a new central bank, the European Central Bank.

The participants have also agreed in principle to strict limits on their fiscal policies. Their deficits can be no greater than 3% of nominal GDP, and their total national debt cannot exceed 60% of nominal GDP.

Whether sovereign nations will be able—or willing—to operate under economic restrictions as strict as these remains to be seen. Indeed, several of the nations in the eurozone have exceeded the limit on national deficits.

A major test of the euro coincided with its 10th anniversary at about the same time the 2008 world financial crisis occurred. It has been a mixed blessing in getting through this difficult period. For example, guarantees that the Irish government made concerning bank deposits and debt have been better received, because Ireland is part of the euro system. On the other hand, if Ireland had a floating currency, its depreciation might enhance Irish exports, which would help Ireland to get out of its recession.

The 2008 crisis also revealed insights into the value of the euro as an international currency. The dollar accounts for about two-thirds of global currency reserves, while the euro accounts for about 25%. Most of world trade is still conducted in dollars, and even within the eurozone about a third of trade is conducted in dollars. One reason that the euro has not gained more on the dollar in terms of world usage during its first 10 years is that, whereas the U.S. government is the single issuer of its public debt, each of the 16 separate European governments in the eurozone issues its own debt. The smaller market for each country’s debt, each with different risk premiums, makes them less liquid, especially in difficult financial times.

When the euro was launched it was hoped that having a single currency would nudge the countries toward greater market flexibility and higher productivity. However, income per capita is about at the same level in the eurozone as it was 10 years ago in comparison to that of the United States—about 70%.

Source: “Demonstrably Durable: The Euro at Ten,” Economist, January 3, 2009, p. 50–52.

Answer to Try It! Problem

The value of the mon is initially $2. Fear that the mon might fall will lead to an increase in its supply to S₂, putting downward pressure on the currency. To maintain the value of the mon at $2, the central bank will buy mon, thus shifting the demand curve to D₂. This policy, though, creates two difficulties. First, it requires that the bank sell other currencies, and a sale of any asset by a central bank is a contractionary monetary policy. Second, the sale depletes the bank’s holdings of foreign currencies. If holders of the mon fear the central bank will give up its effort, then they might sell mon, shifting the supply curve farther to the right and forcing even more vigorous action by the central bank.

Figure 15.11