In general not a Krugman fan, but this is brilliant https://www.princeton.edu/~pkrugman/interstellar.pdf https://www.princeton.edu/~pkrugman/interstellar.pdf

In general not a Krugman fan, but this is brilliant https://www.princeton.edu/~pkrugman/interstellar.pdf https://www.princeton.edu/~pkrugman/interstellar.pdf The Theory of Interstellar Trade, in which he develops a theory of trade where differences in time due to relativistic speeds is considered.