EViews computes several forms of band-pass (frequency) filters. These filters are used to
isolate the cyclical component of a time series by specifying a range for its duration. Roughly
speaking, the band-pass filter is a linear filter that takes a two-sided weighted moving average
of the data where cycles in a “band”, given by a specified lower and upper bound, are
“passed” through, or extracted, and the remaining cycles are “filtered” out.
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