Until the mid-19th century, shortages of currency were sometimes serious problems. One common response was to prohibit the export of coins. We use a random matching model with indivisible money to explain a shortage and to judge the desirability of a prohibition on the export of coins. The model, although extreme in many regards, represents better than earlier models a demand for outside money and the problems that arise when that money is indivisible. It can also rationalize a prohibition on the export of coins.
Published in: _Journal of Monetary Economics_ (Vol. 40, No. 3, December 1997, pp. 555-572), https://doi.org/10.1016/S0304-3932(97)00053-6.