How Long Did It Take the United States to Become an Optimal Currency Area?
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The United States is often taken to be the exemplar of the benefits of a monetary union. Since 1788 Americans, with the exception of the Civil War years, have been able to buy and sell goods, travel, and invest within a vast area without ever having to be concerned about changes in exchange rates.
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美国国家经济研究局创建时间：
2000-04-01
