Fluctuations in Overseas Travel by Americans, 1820 to 2000
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There were substantial fluctuations in the numbers of American overseas travelers, especially before World War II. These fluctuations in travel around the robust, long term upward trend are the focus of this paper. We first identify those fluctuations in the raw data and then try to explain the
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美国国家经济研究局创建时间：
2009-04-01
