This study examines theoretically as well as empirically the behavior of a small open economy, first, under a dual official-black market exchange rate regime, and then, under the process of unification that has as its ultimate objective to absorb and legalize the black market for foreign exchange, eliminating the inefficiencies and market fragmentation associated with quasi-illegal activities. The study provides a modest insight into the difficulties of maintaining a system of dual exchange rates, on the one hand, and into the problems that a central bank may face in the conduct of monetary...