Lectures in Macroeconomics- Charles W. Upton Specialization.

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Comparative Advantage and the Gains from Trade
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Presentation transcript:

Lectures in Macroeconomics- Charles W. Upton Specialization

Basic Principles We all have comparative advantages We are all made better off by specializing in our comparative advantage Economists refer to this as gains from trade.

Specialization Where do you find Specialization? Within a business –Different employees do different tasks With a country –Firms tend to buy a lot of inputs from other specialized firms. –Miller’s Pizzeria does not make its own flour or cheese. Between nations

Specialization The Growth in Trade Transportation and communication costs have fallen, making it profitable to ship many items around the world. A series of trade agreements has resulted in significantly lower tariffs (taxes on imports) and other barriers to trade. These include –The European Economic Community –NAFTA –ASEAN –The World Trade Organization

Specialization The Case for Trade The case for International Trade is the same as the case for domestic trade. –We can all gain by specialization, and the principle can easily be extended to the international arena. –After all, do I personally care whether my car comes from Detroit, Atlanta, or Japan?

Specialization A Little History Adam Smith and The Wealth of Nations Mercantilism –Stressed self-sufficiency –Measures well-being in terms of gold. Smith stressed standard of living

Specialization An Example

Specialization Key Points American workers are more productive than Mexican workers and will have higher wage rates. The workers of each nation have a comparative advantage. –In the CD industry, Americans are ten times as productive as Mexicans are. –In the T-shirt industry, American workers are only four times as productive.

Specialization The Gains from Trade If they trade, both parties will gain, despite –The American Worker’s fear of competing with "cheap foreign labor". –The Mexican Worker’s fear of competing against more productive workers.

Specialization The price of a t-shirt Absent International Trade –In the US, a Music CD costs two T-shirts, for that is the opportunity cost of producing a Music CD. –In Mexico, a Music CD costs five T-shirts, for that is the opportunity cost of producing the Music CD.

Specialization The price of a t-shirt With International Trade –The price of a Music CD, in terms of a T-shirt, the terms of trade, must be the same in both countries. – The price must be between 2 and 5 t-shirts; just what depends on supply and demand We will assume (so that we can get on with this example) that the actual price is 3:1.

Specialization Supply and Demand D US Demand for CD’sMexican Demand for CD’s D 2 5 3

Specialization The Gains from Trade Suppose 10 Americans switched from producing t-shirts to music CDs. Then –US T-shirt production declines by 200 t-shirts per day –US Music CD production rises by 100 music CDs per day. The US can trade the music CDs for 300 Mexican t-shirts for a net gain of 100 t- shirts in the US.

Specialization The Gains from Trade The Mexicans also gain. If 60 Mexicans switch from producing Music CDs to t- shirts, then –Mexican music CD production declines by 60 per day. –Mexican t-shirt production rises by 300 per day. –Mexicans can trade the t-shirts for music CDs for a net gain of 40 music CDs to Mexico.

Specialization A Tabular Presentation

Specialization Summary Whenever nations or individuals have comparative advantage, they gain from trade. –There are always comparative advantages. Other issues: –What causes Comparative Advantage –Objections to Free Trade –A history of trade policy

Specialization End ©2005 Charles W. Upton. All rights reserved