Traditionally, tariffs were used simply as a political tool to protect:
- Certain social interests.
 - Certain cultural interests.
 - Certain vested economic interests.
 - All of the above.
 - None of the above.
 
The linear production possibilities frontier:
- Is a less realistic model.
 - Is a more realistic model.
 - Illustrates increasing opportunity costs.
 - Illustrates decreasing opportunity costs.
 - All of the above.
 
The underlying reason why trade benefits both sides is:
- The government forces it to.
 - Based on absolute advantage.
 - Rooted in the concept of opportunity cost.
 - Tooted from the hills.
 - Muted on the television.
 
Trade really occurs:
- To keep poor folks down.
 - To get even with the rich.
 - Because of absolute advantage.
 - Because of comparative advantage.
 - All of the above.
 
         
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