Fewer Monies, Better Monies
回顾了新兴市场危机后关于美元化或货币局制度的争论，认为浮动汇率制在跨期视角下并不优于固定汇率制，且许多国家并未有效利用汇率灵活性。
In the aftermath of emerging market crises from Russia to Asia and Latin America, there is a quest for better monetary arrangements that are more crisis-proof. Fixed rates are out, flexible rates are in with a policy focus on inflation targeting. But there is, of course, the alternative of abolishing exchange rates all together. This paper revisits the issue of dollarization or currency boards to review what arguments in the debate stand up. The case for flexible exchange rates emphasizes the need for a tool to accomplish relative price adjustment. This paper argues that in an intertemporal perspective most shocks require financing in the capital market rather than adjustment. Moreover, countries frequently do not use their flexible rate to play a cyclical role and, as a result, only a pay a premium for the option to depreciate but do not take advantage of the flexibility; on the contrary, they engineer systematic overvaluation in the context of inflation targeting.