The X-11 Variant of the Census Method II Seasonal Adjustment Program
The X-11 Variant of the Census Method II Seasonal Adjustment Program
Introduction
There are various and sundry methods for seasonally adjusting economic time series, all of which are based on the premise that seasonal fluctuations can be measured in an original series (O) and separated from trend, cyclical, trading-day, and irregular fluctations. The seasonal component (S) is defined as the intrayear pattern of variation which is repeated constantly or in an evolving fashion from year to year.
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Page Last Revised - October 8, 2021