They SAY it’s for economics, but what of his other work?

Paul Krugman, of course, won the Nobel in economics earlier this week, and bully for him. However, Tor books points out that perhaps Krugman’s most interesting work came early in his career:

Krugman is famous for his work on the economics of international trade, but as our corporate cousins at Nature remind us, one of his early works was a pioneering examination entitled The Theory of Interstellar Trade:

Abstract: This paper extends interplanetary trade theory to an interstellar setting. It is chiefly concerned with the following question: how should interest charges on goods in transit be computed when the goods travel at close to the speed of light? This is a problem because the time taken in transit will appear less to an observer travelling with the goods than to a stationary observer. A solution is derived from economic theory, and two useless but true theorems are proved.

The young Krugman observed that “This paper, then, is a serious analysis of a ridiculous subject, which is of course the opposite of what is usual in economics.”

(Krugman is also known as an unapologetic fan of SF.)

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