The Simple Analytics of Sudden Stops

Currency crises in emerging and developing countries have often been characterized by "sudden stops" of capital flows. A variety of mechanisms have been adduced to explain the emergence of this phenomenon. This paper integrates these mechanisms into a simple and transparent analytical model in which currency mismatches, large current account deficits, and large stocks of short-term debt interact with low reserve stocks to generate dual equilibria. In this context, the "panic" equilibrium is characterized by a currency crisis, a sudden stop, and an output collapse. The potential for various policies to avoid this outcome is explored, as are the implications of the analysis for reserve accumulation.