To devalue or to defend? The political economy of exchange rate policy

Speculative currency attacks are a regular feature of the international political economy. Nevertheless, not all speculative attacks result in a devalued currency. In many cases, politicians were willing and able to defend the exchange rate peg. I develop a model of strategic interaction between speculators in currency markets and policymakers in governments. This model indicates that speculative attacks occur when economic fundamentals are weak or when there is uncertainty about the capability and/or willingness of governments to defend the currency peg. I show that the government's decision to defend the peg reflects institutional, electoral, and partisan incentives. I test hypotheses from this model on a sample of 90 developing countries between 1985 and 1998 using a strategic probit model.