International Economics - kuweb.econ.ku.dk/Nguyen/teaching/Spring09/Lecture01Spring09.pdf ·...

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Professor: Dan Nguyen Office: Studiestraede 03031 (office hours by appointment) Email: [email protected] (email me) Lectures: HO3 Wednesdays 15:00 Website: http://web.econ.ku.dk/nguyen/teaching/Spring09/ Book: Feenstra and Taylor (International Trade or International Economics) Exam: Book, class notes, published papers Questions: Why does international trade exist? Why do rich countries trade with poor countries? Why do rich countries trade with each other? Is trade beneficial? For everyone? What are the effects of reducing tariffs? International Economics Lecture 01 Page 1

Transcript of International Economics - kuweb.econ.ku.dk/Nguyen/teaching/Spring09/Lecture01Spring09.pdf ·...

Page 1: International Economics - kuweb.econ.ku.dk/Nguyen/teaching/Spring09/Lecture01Spring09.pdf · Website: Book: Feenstra and Taylor (International Trade or International Economics) Exam:

Professor: Dan NguyenOffice: Studiestraede 03‐031 (office hours by appointment)Email: [email protected] (email me)Lectures: HO3 Wednesdays 15:00Website: http://web.econ.ku.dk/nguyen/teaching/Spring09/

Book: Feenstra and Taylor (International Trade or International Economics)

Exam: Book, class notes, published papers

Questions:

Why does international trade exist?

Why do rich countries trade with poor countries?

Why do rich countries trade with each other?

Is trade beneficial? For everyone? 

What are the effects of reducing tariffs?

International Economics

Lecture 01 Page 1

Page 2: International Economics - kuweb.econ.ku.dk/Nguyen/teaching/Spring09/Lecture01Spring09.pdf · Website: Book: Feenstra and Taylor (International Trade or International Economics) Exam:

Scenario: Denmark builds a Lego factory in China, which uses Vietnamese immigrant labor, and sells Chinese made Legos to USA.

International Trade: Movement of goods across countries

Import: the purchase of a good from another country (or the good in question)

Export: The sale of a good or service to another country (or the good in question)

Trade balance: the difference between a country's total value of exports and it's total value of imports.

Trade surplus: Trade Balance when the Trade Balance > 0  (Exports > Imports)

Trade deficit: Trade Balance when the Trade Balance < 0  (Exports < Imports)

Bilateral Trade Balance: The trade balance between two countries

Production: Transformation of factors into goods

Definitions

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Page 3: International Economics - kuweb.econ.ku.dk/Nguyen/teaching/Spring09/Lecture01Spring09.pdf · Website: Book: Feenstra and Taylor (International Trade or International Economics) Exam:

Import Tariff: A tax on an import taken by the importing country.

Trade Barrier: something that lowers the possible trade between two countries

Movement of Factors across countries

Migration: The flow of people across countries

Scenario: Denmark has builds a Lego factory in China, which uses Vietnamese immigrant labor, and sells Chinese made Legos to USA.

Foreign Direct Investment: The flow of capital across countries

Horizontal FDI: FDI in order to overcome/reduce trade barriers

Vertical FDI: FDI in order to reduce factor costs

Lecture 01 Page 3

Page 4: International Economics - kuweb.econ.ku.dk/Nguyen/teaching/Spring09/Lecture01Spring09.pdf · Website: Book: Feenstra and Taylor (International Trade or International Economics) Exam:

An effective map(model):Reduces world complexity without losing predictive power.

Learn Economic intuition with Math

Modeler's job: make the model just complex enough to answer the posed questions.

Models As Maps

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Page 5: International Economics - kuweb.econ.ku.dk/Nguyen/teaching/Spring09/Lecture01Spring09.pdf · Website: Book: Feenstra and Taylor (International Trade or International Economics) Exam:

Assumptions:  Two countries, Two goods

single factor ‐ Labor

constant returns to scale technology

Technologies differ across countries

Example:   j = Denmark and Vietnam

i = beef and cellphones

L = 100 for both countries

y_ij= output

Denmark Vietnam

Beef ( kgs) 10 5

Cellphones  5 2

Utility:u  consumption: x 1j bj cju x x

*ij ij ij

bj cj j

y m l

l l L

ijm

The Ricardian Model: A simple trade model (Chapter 2)

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Page 6: International Economics - kuweb.econ.ku.dk/Nguyen/teaching/Spring09/Lecture01Spring09.pdf · Website: Book: Feenstra and Taylor (International Trade or International Economics) Exam:

Autarky: No Trade

ijm Denmark Vietnam

Beef (kg) 10 5

Cellphones  5 2

1,max

. .

bj cjx x j bj cj

bj bj bj bj

cj cj cj cj

bj cj

u x x

s t

x y m l

x y m l

l l L

*ij ij ij

bj cj j

y m l

l l L

1j bj cju x x

Denmark's Autarky Equilibrium

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Lecture 01 Page 7