Financial crises and exchange rate policy

This paper studies exchange rate policy in a small open economy model featuring an occasionally binding collateral constraint and Fisherian deflation. The goal is to evaluate the performance of alternative exchange rate policies in sudden stop-prone economies. The key element of the analysis is a pecuniary externality arising from frictions in the international credit markets, which creates a trade-off between price and financial stability. The main result is that depreciating the exchange rate during a financial crisis has a positive impact on welfare, because the stimulus provided by a depreciation sustains asset prices, value of collateral, and access to the international credit markets.