We address the fact that the incidence of speculative attacks tends to
be temporally correlated; that is, currency crises appear to pass ''c
ontagiously'' from one country to another. The paper provides a survey
of the theoretical literature. We also provide empirical evidence con
sistent with the contagious nature of currency crises. We estimate tha
t the existence of a currency crisis elsewhere in the world (whether s
uccessful or not) raises the probability of an attack on the domestic
currency by 8 percent, even after taking account of a variety of domes
tic political and economic factors.