Free Trade and Trade Protection (id: 0734290cb)

本题目来源于试卷: Free Trade and Trade Protection，类别为 IB经济学

[单选题]

The above diagrams show the production possibility frontiers (PPFs) of Country A and Country B. Both countries use the same amount of resources to produce CDs and wine.

Which of the following statements are true?

A. Country A has a comparative advantage in the production of both goods.
B. Country B has a comparative advantage in the production of both goods
C. Country A has a comparative advantage in wine, and Country B has a comparative advantage in CDs.
D. Country A has a comparative advantage in CDs, and Country B has a comparative advantage in wine.


参考答案:  C


本题详细解析:

C

$\underset{‾}{\text{Key idea}}$:
A country has a comparative advantage in the production of a good if it produces that good at a lower opportunity cost (OC) than another country. It means it has to sacrifice fewer units of the other commodity than the other country.

$\underset{‾}{\text{Explanation}}$:

$$ $OC={\displaystyle \frac{Goodssacrificed}{Goodsobtained}}$

$$ $OCofwineincountryA={\displaystyle \frac{50}{50}}=1$

$$ $OCofwineincountryB={\displaystyle \frac{30}{15}}=2$

$$ $OCofCDsincountryA={\displaystyle \frac{50}{50}}=1$

$$ $OCofCDsincountryB={\displaystyle \frac{15}{30}}=0.5$

As country $A$ has a lower OC in the production of wine it has a comparative advantage in the production of wine. Similarly, country 

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