> This paper extends interplanetary trade to an interstellar setting. It is chiefly concerned with the following question: How should interest on goods in tranist 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.
> This paper extends interplanetary trade to an interstellar setting. It is chiefly concerned with the following question: How should interest on goods in tranist 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.