The Other Twins: Currency and Debt Crises
37 Pages Posted: 24 Jul 2007
Date Written: January 2003
Abstract
Empirically, currency crises are more frequently accompanied by simultaneous sovereign debt crises than by banking crises. Nevertheless the phenomenon of twin currency and debt crises has so far been treated in economic literature only sparsely. We analyse the optimal policy of a government that may choose and combine two policy alternatives. She may choose at the same time whether to keep or alternatively exit an existing exchange rate peg and whether or not to default on her debt. Both parameters have a large impact not only on the public welfare but on the government's budget as well. The resulting incentive system can generate situations with self-fulfilling expectations. In some situations an internal contagion effect arises. A crisis in the sovereign debt market spreads to the sector of exchange rate policy and causes a devaluation as well. Private investors' default expectations thus can not only cause a sovereign debt crisis but may lead to a currency crisis as well.
Keywords: currency crises, internal contagion, self-fulfilling expectations and sovereign debt
JEL Classification: E61, F34, F41
Suggested Citation: Suggested Citation
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