On the Existence and Interpretation of the "Unit Root" in U.S. GNP
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We use the revised estimates of U.S. GNP constructed by Christina Romer (1989) to assess the time-series properties of U.S. output per capita over the past century. We reject at conventional significance levels the null that output is a random walk in favor of the alternative that output is a
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美国国家经济研究局创建时间：
1988-09-01
