This thread is not complete without a link to Paul Krugman's paper, "The Theory of Interstellar Trade". Abstract: This paper extends interplanetary trade theor

This thread is not complete without a link to Paul Krugman's paper, "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. http://www.princeton.edu/~pkrugman/interstellar.pdf http://www.princeton.edu/~pkrugman/interstellar.pdf