NY Times columnist and economist Paul Krugman wrote a paper when he was an assistant professor in 1978 called The Theory of Interstellar Trade. Here’s the 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 good than to a stationary observer. A solution is derived from economic theory, and two useless but true theorems are proved.

• economics
• paulkrugman
• physics

NY Times columnist Paul Krugman writes, in the introduction to his new blog:

The story of modern America is, in large part, the story of the fall and rise of inequality.

Note that he says “fall” and then “rise”, not the other way around. A graph in the post illustrates his point nicely.

• economics
• money
• paulkrugman