Bill Watterson, creator of the beloved Calvin and Hobbes comic strip, also did some editorial cartoons for Sun Newspapers in the early 1980s. This appeared in the Brunswick Sun Times on 2 Feb 1984:

Economists frequently compare trade to technology to explain how trade expands a country’s consumption possibility set (David Friedman’s The Iowa Car Crop, Greg Mankiw’s Isoland inventer) and argue that tariffs are akin to taxes on using a more efficient production technology. Perhaps Bill Watterson’s comic will appear in textbooks soon.

From the Cleveland Sun (via Radley Balko).