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31_4E - Open-Economy Macroeconomics Basic Concepts.ppt
1.
© 2007 Thomson
South-Western
2.
© 2007 Thomson
South-Western Open-Economy Macroeconomics: Basic Concepts • Open and Closed Economies – A closed economy is one that does not interact with other economies in the world. • There are no exports, no imports, and no capital flows. – An open economy is one that interacts freely with other economies around the world.
3.
© 2007 Thomson
South-Western Open-Economy Macroeconomics: Basic Concepts • An open economy interacts with other countries in two ways. – It buys and sells goods and services in world product markets. – It buys and sells capital assets in world financial markets.
4.
© 2007 Thomson
South-Western THE INTERNATIONAL FLOW OF GOODS AND CAPITAL • The Flow of Goods: Exports, Imports, and Net Exports – The United States is a very large and open economy—it imports and exports huge quantities of goods and services. – Over the past four decades, international trade and finance have become increasingly important.
5.
© 2007 Thomson
South-Western The Flow of Goods: Exports, Imports, Net Exports • Exports are goods and services that are produced domestically and sold abroad. • Imports are goods and services that are produced abroad and sold domestically.
6.
© 2007 Thomson
South-Western The Flow of Goods: Exports, Imports, Net Exports • Net exports (NX) are the value of a nation’s exports minus the value of its imports. • Net exports are also called the trade balance.
7.
© 2007 Thomson
South-Western The Flow of Goods: Exports, Imports, Net Exports • A trade deficit is a situation in which net exports (NX) are negative. • Imports > Exports • A trade surplus is a situation in which net exports (NX) are positive. • Exports > Imports • Balanced trade refers to when net exports are zero—exports and imports are exactly equal.
8.
© 2007 Thomson
South-Western The Flow of Goods: Exports, Imports, Net Exports • Factors That Affect Net Exports • The tastes of consumers for domestic and foreign goods. • The prices of goods at home and abroad. • The exchange rates at which people can use domestic currency to buy foreign currencies.
9.
© 2007 Thomson
South-Western The Flow of Goods: Exports, Imports, Net Exports • Factors That Affect Net Exports • The incomes of consumers at home and abroad. • The costs of transporting goods from country to country. • The policies of the government toward international trade.
10.
© 2007 Thomson
South-Western Figure 1 The Internationalization of the U.S. Economy Percent of GDP 0 5 10 15 1950 1955 1960 1965 1970 1975 1980 1990 1985 2000 2005 1995 Imports Exports
11.
© 2007 Thomson
South-Western The Flow of Financial Resources: Net Capital Outflow • Net capital outflow refers to the purchase of foreign assets by domestic residents minus the purchase of domestic assets by foreigners. • A U.S. resident buys stock in the Toyota corporation and a Mexican buys stock in the Ford Motor corporation.
12.
© 2007 Thomson
South-Western The Flow of Financial Resources: Net Capital Outflow • When a U.S. resident buys stock in Telmex, the Mexican phone company, the purchase raises U.S. net capital outflow. • When a Japanese residents buys a bond issued by the U.S. government, the purchase reduces the U.S. net capital outflow.
13.
© 2007 Thomson
South-Western The Flow of Financial Resources: Net Capital Outflow • Variables that Influence Net Capital Outflow • The real interest rates being paid on foreign assets. • The real interest rates being paid on domestic assets. • The perceived economic and political risks of holding assets abroad. • The government policies that affect foreign ownership of domestic assets.
14.
© 2007 Thomson
South-Western The Equality of Net Exports and Net Capital Outflow • For an economy as a whole, NX and NCO must balance each other so that: NCO = NX • This holds true because every transaction that affects one side must also affect the other side by the same amount.
15.
© 2007 Thomson
South-Western Saving, Investment, and Their Relationship to the International Flows • Net exports is a component of GDP: Y = C + I + G + NX • National saving is the income of the nation that is left after paying for current consumption and government purchases: Y – C – G = I + NX
16.
© 2007 Thomson
South-Western Saving, Investment, and Their Relationship to the International Flows • National saving (S) equals Y – C – G so: S = I + NX • or Saving Domestic Investment Net Capital Outflow = + S I NCO = +
17.
© 2007 Thomson
South-Western Table 1 International Flows of Goods and Capital: Summary
18.
© 2007 Thomson
South-Western Figure 2 National Saving, Domestic Investment, and Net Foreign Investment (a) National Saving and Domestic Investment (as a percentage of GDP) Percent of GDP 20 18 16 14 12 10 1960 1965 1995 1990 1985 1980 1975 1970 2000 2005 National saving Domestic investment
19.
© 2007 Thomson
South-Western Figure 2 National Saving, Domestic Investment, and Net Foreign Investment (b) Net Capital Outflow (as a percentage of GDP) Percent of GDP 2 6 5 4 3 2 1 0 1 1960 1965 1995 1990 1985 1980 1975 1970 2000 2005 Net capital outflow
20.
© 2007 Thomson
South-Western THE PRICES FOR INTERNATIONAL TRANSACTIONS: REAL AND NOMINAL EXCHANGE RATES • International transactions are influenced by international prices. • The two most important international prices are the nominal exchange rate and the real exchange rate.
21.
© 2007 Thomson
South-Western • The nominal exchange rate is the rate at which a person can trade the currency of one country for the currency of another. Nominal Exchange Rates
22.
© 2007 Thomson
South-Western Nominal Exchange Rates • The nominal exchange rate is expressed in two ways: • In units of foreign currency per one U.S. dollar. • And in units of U.S. dollars per one unit of the foreign currency.
23.
© 2007 Thomson
South-Western Nominal Exchange Rates • Assume the exchange rate between the Japanese yen and U.S. dollar is 80 yen to one dollar. • One U.S. dollar trades for 80 yen. • One yen trades for 1/80 (= 0.0125) of a dollar.
24.
© 2007 Thomson
South-Western Nominal Exchange Rates • Appreciation refers to an increase in the value of a currency as measured by the amount of foreign currency it can buy. • Depreciation refers to a decrease in the value of a currency as measured by the amount of foreign currency it can buy.
25.
© 2007 Thomson
South-Western Nominal Exchange Rates • If a dollar buys more foreign currency, there is an appreciation of the dollar. • If it buys less there is a depreciation of the dollar.
26.
© 2007 Thomson
South-Western Real Exchange Rates • The real exchange rate is the rate at which a person can trade the goods and services of one country for the goods and services of another.
27.
© 2007 Thomson
South-Western Real Exchange Rates • The real exchange rate compares the prices of domestic goods and foreign goods in the domestic economy. • If a case of German beer is twice as expensive as American beer, the real exchange rate is 1/2 case of German beer per case of American beer.
28.
© 2007 Thomson
South-Western Real Exchange Rates • The real exchange rate depends on the nominal exchange rate and the prices of goods in the two countries measured in local currencies.
29.
© 2007 Thomson
South-Western Real Exchange Rates • The real exchange rate is a key determinant of how much a country exports and imports. Real exchange rate = Nominal exchange rate Domestic price Foreign price ×
30.
© 2007 Thomson
South-Western Real Exchange Rates • A depreciation (fall) in the U.S. real exchange rate means that U.S. goods have become cheaper relative to foreign goods. • This encourages consumers both at home and abroad to buy more U.S. goods and fewer goods from other countries.
31.
© 2007 Thomson
South-Western Real Exchange Rates • As a result, U.S. exports rise, and U.S. imports fall, and both of these changes raise U.S. net exports. • Conversely, an appreciation in the U.S. real exchange rate means that U.S. goods have become more expensive compared to foreign goods, so U.S. net exports fall.
32.
© 2007 Thomson
South-Western A FIRST THEORY OF EXCHANGE-RATE DETERMINATION: PURCHASING-POWER PARITY • The purchasing-power parity theory is the simplest and most widely accepted theory explaining the variation of currency exchange rates.
33.
© 2007 Thomson
South-Western The Basic Logic of Purchasing-Power Parity • Purchasing-power parity is a theory of exchange rates whereby a unit of any given currency should be able to buy the same quantity of goods in all countries. • According to the purchasing-power parity theory, a unit of any given currency should be able to buy the same quantity of goods in all countries.
34.
© 2007 Thomson
South-Western The Basic Logic of Purchasing-Power Parity • The theory of purchasing-power parity is based on a principle called the law of one price. • According to the law of one price, a good must sell for the same price in all locations. • If the law of one price were not true, unexploited profit opportunities would exist. • The process of taking advantage of differences in prices in different markets is called arbitrage.
35.
© 2007 Thomson
South-Western The Basic Logic of Purchasing-Power Parity • If arbitrage occurs, eventually prices that differed in two markets would necessarily converge. • According to the theory of purchasing-power parity, a currency must have the same purchasing power in all countries and exchange rates move to ensure that.
36.
© 2007 Thomson
South-Western Implications of Purchasing-Power Parity • If the purchasing power of the dollar is always the same at home and abroad, then the exchange rate cannot change. • The nominal exchange rate between the currencies of two countries must reflect the different price levels in those countries.
37.
© 2007 Thomson
South-Western Implications of Purchasing-Power Parity • When the central bank prints large quantities of money, the money loses value both in terms of the goods and services it can buy and in terms of the amount of other currencies it can buy.
38.
© 2007 Thomson
South-Western Figure 3 Money, Prices, and the Nominal Exchange Rate During the German Hyperinflation 10,000,000,000 1,000,000,000,000,000 100,000 1 .00001 .0000000001 1921 1922 1923 1924 Exchange rate Money supply Price level 1925 Indexes (Jan. 1921 = 100)
39.
© 2007 Thomson
South-Western Limitations of Purchasing-Power Parity • Many goods are not easily traded or shipped from one country to another. • Tradable goods are not always perfect substitutes when they are produced in different countries.
40.
Summary © 2007 Thomson
South-Western • Net exports are the value of domestic goods and services sold abroad minus the value of foreign goods and services sold domestically. • Net capital outflow is the acquisition of foreign assets by domestic residents minus the acquisition of domestic assets by foreigners.
41.
Summary © 2007 Thomson
South-Western • An economy’s net capital outflow always equals its net exports. • An economy’s saving can be used to either finance investment at home or to buy assets abroad.
42.
Summary © 2007 Thomson
South-Western • The nominal exchange rate is the relative price of the currency of two countries. • The real exchange rate is the relative price of the goods and services of two countries.
43.
Summary © 2007 Thomson
South-Western • When the nominal exchange rate changes so that each dollar buys more foreign currency, the dollar is said to appreciate or strengthen. • When the nominal exchange rate changes so that each dollar buys less foreign currency, the dollar is said to depreciate or weaken.
44.
Summary © 2007 Thomson
South-Western • According to the theory of purchasing-power parity, a unit of currency should buy the same quantity of goods in all countries. • The nominal exchange rate between the currencies of two countries should reflect the countries’ price levels in those countries.
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