克鲁格曼-国际经济学第十版-课件C01.ppt

Pearson Education Limited 2015. All rights reserved.1-1 Chapter 1Introduction Pearson Education Limited 2015. All rights reserved.1-2 Preview What is international economics about? International trade topics Gains from trade, explaining patterns of trade, effects of government policies on trade International finance topics Balance of payments, exchange rate determination, international policy coordination and capital markets International trade versus finance Pearson Education Limited 2015. All rights reserved.1-3 What Is International Economics About? International economics is about how nations interact through: trade of goods and services, flows of money, and investment. International economics is an old subject, but continues to grow in importance as countries become tied more to the international economy. Nations are now more closely linked than ever before. Pearson Education Limited 2015. All rights reserved.1-4 What Is International Economics About? (cont.) U.S. exports and imports as shares of gross domestic product have been on a long-term upward trend. International trade has roughly tripled in importance compared to the economy as a whole in the past 50 years. Both imports and exports fell in 2009 due to the recession. Pearson Education Limited 2015. All rights reserved.1-5 Fig. 1-1: Exports and Imports as a Percentage of U.S. National Income Pearson Education Limited 2015. All rights reserved.1-6 What Is International Economics About? (cont.) Compared to the United States, other countries are even more tied to international trade. Their imports and exports as a share of GDP are substantially higher. The United States, due to its size and diversity of resources, relies less on international trade than almost any other country. Pearson Education Limited 2015. All rights reserved.1-7 Fig. 1-2: Average of Exports and Imports as Percentage of National Income in 2011 Pearson Education Limited 2015. All rights reserved.1-8 Gains from TradeThat there are gains from trade is probably the most important insight in international economics.Countries selling goods and services to each other almost always generates mutual benefits.1. When a buyer and a seller engage in a voluntary transaction, both can be made better off.Norwegian consumers import oranges that they would have a hard time producing. Pearson Education Limited 2015. All rights reserved.1-9 Gains from Trade (cont.)2. How could a country that is the most (least) efficient producer of everything gain from trade?Countries use finite resources to produce what they are most productive at (compared to their other production choices), then trade those products for goods and services that they want to consume.Countries can specialize in production, while consuming many goods and services through trade. Pearson Education Limited 2015. All rights reserved.1-10 Gains from Trade (cont.)3. Trade benefits countries by allowing them to export goods made with relatively abundant resources and imports goods made with relatively scarce resources.4. When countries specialize, they may be more efficient due to larger-scale production.5. Countries may also gain by trading current resources for future resources (international borrowing and lending) and due to international migration. Pearson Education Limited 2015. All rights reserved.1-11 Gains from Trade (cont.) Trade is predicted to benefit countries as a whole in several ways, but trade may harm particular groups within a country. International trade can harm the owners of resources that are used relatively intensively in industries that compete with imports. Trade may therefore affect the distribution of income within a country. Pearson Education Limited 2015. All rights reserved.1-12 Patterns of Trade The pattern of trade describes who sells what to whom. Differences in climate and resources explain why Brazil exports coffee and Saudi Arabia exports oil. But why does Japan export automobiles, while the U.S. exports aircraft? Why some countries export certain products can stem from differences in: Labor productivity Relative supplies of capital, labor and land and their use in the production of different goods and services Pearson Education Limited 2015. All rights reserved.1-13 Effects of Government Policies on Trade Policy makers affect the amount of trade through tariffs: a tax on imports or exports, quotas: a quantity restriction on imports or exports, export subsidies: a payment to producers that export, or through other regulations (ex., product specifications) that exclude foreign products from the market, but still allow domestic products. What are the costs and benefits of these policies? Pearson Education Limited 2015. All rights reserved.1-14 The Effects of Government Policies on Trade (cont.) If a government restricts trade, what are the costs if foreign governments respond likewise? Trade policies are often chosen to cater to special interest groups, rather than to maximize national welfare. Governments tend to adopt tariffs, then negotiate them down in exchange for reduction in trade barriers of other countries. Pearson Education Limited 2015. All rights reserved.1-15 International Finance Topics Exchanging risky assets such as stocks and bonds can benefit all countries by diversification that reduces the variability of income another source of gains from trade. Most international trade involves monetary transactions. Many monetary events have important consequences for international trade. Pearson Education Limited 2015. All rights reserved.1-16 Balance of Payments Governments measure the value of exports and imports, as well as the value of financial assets that flow into and out of their countries. Trade deficits, where countries import more than they export in value, may be offset by net inflows of financial assets. The official settlements balance, or the balance of payments, measures the balance of funds that central banks use for official international payments. All three values are measured in the governments national income accounts. Pearson Education Limited 2015. All rights reserved.1-17 Exchange Rate Determination Exchange rates are an important financial issue for most governments. Exchange rates measure how much domestic currency can be exchanged for foreign currency and thus affect: how much goods denominated in foreign currency (imports) cost in the domestic country. how much goods denominated in domestic currency (exports) cost in foreign markets. Some exchange rates change continually (float) while others are fixed for periods of time. Pearson Education Limited 2015. All rights reserved.1-18 International Policy Coordination In an integrated economy, one countrys economic policies usually affect other countries as well, leading to the need for some degree of policy coordination. Depends on type of exchange rate regime. Capital markets, where money is exchanged for promises to pay in the future, have special concerns in an international setting: Currency fluctuations can alter the value paid. Countries, especially developing ones, might default on debt. Pearson Education Limited 2015. All rights reserved.1-19 The International Capital Market Capital markets are arrangements by which individuals and firms exchange money now for promises to pay in the future. International capital markets cope with special regulations that countries impose on foreign investments Special risks of currency fluctuations and national default; Sometimes offer opportunities to evade regulations placed on domestic markets. Pearson Education Limited 2015. All rights reserved.1-20 International Trade Versus Finance International trade focuses on transactions involving movement of goods and services across nations. International trade theory (Econ/Trade Chapters 28) and policy (Econ/Trade Chapters 912) International finance focuses on financial or monetary transactions across nations. International monetary theory (Econ Chapters 1318/Finance Chapters 2-7) and policy (Econ Chapters 1922/Finance Chapters 8-11)