This paper, originally published in the fall 1979 Quarterly Review, explains why unfettered markets cannot determine a price at which the currency of one country exchanges for that of another. In effect, any price will work—something which is not true in other markets. The paper then argues that the only feasible regimes for these special markets are floating exchange rates with capital controls or fixed exchange rates with monetary and budget policy coordination.
Reprinted From: _Quarterly Review_ (Vol. 3, No. 4, Fall 1979, pp. 1-7), https://doi.org/10.21034/qr.341.