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- Title
THE PERIODOGRAM OF AMERICAN BUSINESS ACTIVITY.
- Authors
Wilson, Edwin B.
- Abstract
This article presents information on the periodogram of the American business activity. The article also studies a monthly index of American Business Activity from 1790 to the present time prepared by Leonard Ayres. There is enough confusion of terminology which can be used to make their mathematical formulations differ. A phenomenon is said to be strictly periodic only when it repeats itself after a regular interval of time. An index is defined as a phenomenon in which certain entities are tabulated as a certain percentage above or below "normal." This index will necessarily be made at least oscillatory by the process of referring it to "normal." The difference between the mean and the median on the drops is considerable; the median drop is only about three-fifths as long as the median climb, but the means are not so dissimilar. The length of the business cycle from bottom to bottom has a mode in the interval 25-36, presumably at about 36, whereas the length of the cycle from top to top has a mode in the interval 37-38, presumably, however, near to 37.
- Subjects
UNITED States; BUSINESS cycles; AYRES, Leonard; STANDARD deviations; MATHEMATICAL analysis; ECONOMIC history; STATISTICS; ECONOMIC activity; AMERICAN business enterprises
- Publication
Quarterly Journal of Economics, 1934, Vol 48, Issue 3, p375
- ISSN
0033-5533
- Publication type
Article
- DOI
10.2307/1882821