(Chapter 3) The economics of trade
(3.a) Parable of the magic island
(3.b) Comparative advantage
(3.c) Who feeds Stillwater?
Print chapter
Practice Questions

(3) The economics of trade

(3.a) The parable of the magic island

Video 1—Parable of the Magic Island


Figure 1—Impacts of trading with China


(3.b) Comparative advantage

I see Cargill as a great laboratory of both macroeconomics and microeconomics; that the good news is ... many of the things that economic theorists would tell us actually play out on the kitchen tables of individual farmers with 10-key calculators responding to signals. I think in a positive sense watching ... China make a decision to redefine their definition of food security to include importing soybeans rather than compelling land allocation within their own country, against their comparative advantage [is a good thing]
—Page, Greg [interviewee], former CEO of Cargill, the largest privately-held company in the U.S. January 12, 2015. “Greg Page on Food, Agriculture, and Cargill.EconTalk [podcast].


Video 2—Production Possibilities Frontier

Video 3—PPFs and opportunity cost

Video 4—Comparative advantage and when countries trade

Video 5—Proving countries benefit from trade

(3.c) Who feeds Stillwater?


Video 6—Who Feeds Stillwater?

Below are some videos and sheets we discussed in class

Two worksheets regarding some trade issues are here and here



Excerpt from documentary This Is What Free Trade Looks Like describing food sovereignty and dislike of trade wiht the U.S.


Video from The Blaze saying we should only eat U.S. beef