PARTS, SPOTS and SOS offer Multiweek Reach and Frequency tabulations. How are they tabulated?
The RADAR database reflects radio usage over one week. Each multiweek audience estimate is based on the actual correlation (or duplication pattern) from the respondent records within a one-week schedule. Hence, RADAR multiweek estimates are not based on assumed or “normalized” duplication rates between networks, but are based on a procedure that extends an actual within-week listening pattern, which is separately tabulated for each schedule.
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