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| Membership in a currency union is not irreversible. Exit expectations may emerge during sovereign debt crises because exit allows countries to reduce their liabilities through a currency redenomination. As market participants anticipate this possibility sovereign debt crises intensify. We establish this formally within a small open economy model of changing policy regimes. The model permits explosive dynamics of debt and sovereign yields inside currency unions and allows us to distinguish between exit expectations and those of an outright default. By estimating the model on Greek data we quantify the contribution of exit expectations to the crisis dynamics during 2009 to 2012. |
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