Arbitron To Revise Bay Area PPM Data
August 21, 2008 at 2:24 PM (PT)
In a note sent to BAY AREA subscribers, ARBITRON revealed that problems in language-usage estimates will prompt the company to revise and re-release the PPM data for JULY next MONDAY (AUG. 25th). The entire note went as follows:
ARBITRON has discovered that the language-usage population estimates reported in the JULY 2008 SAN FRANCISCO and SAN JOSE PPM Radio Market Reports (released on AUGUST 13th) were not current for the JULY 2008 report period. Reported audience estimates were based on these population estimates and other weighting parameters that were not appropriately updated for JULY. As a result, reported audience estimates, to a limited degree, were understated in some instances and overstated in other instances.
Revised JULY 2008 SAN FRANCISCO and SAN JOSE audience estimates and data, based on appropriate population estimates and weighting, will release on MONDAY, AUGUST 25th at 8a PT.
AUGUST 2008 Week 1 SAN FRANCISCO and SAN JOSE Weeklies estimates (which released on AUGUST 18th) were not affected. Appropriate language-usage population and weighting parameters were used for AUGUST 2008 Week 1 data.
Audience estimates for other markets were not affected in any way.