Demo Glitch Shakes Up Bay Area PPM

PPM Data Revisions

NOVEMBER PPM data for SAN FRANCISCO and SAN JOSE has been postponed from TOMORROW DECEMBER 3rd, at noon PT to FRIDAY, DECEMBER 5th, at NOON. What's more, OCTOBER PPM data is also being revised. The reason for the adjustments were outlined in this letter ARBITRON sent to its PM subscribers in the BAY AREA:

ARBITRON has discovered that files containing population estimates for "persons with children in the household" and "persons with no children in the household" for the NOVEMBER SAN FRANCISCO and SAN JOSE reports were transposed when loaded into our production system for report processing. The rescheduling of the release of data will allow the time necessary for these population files to be properly loaded and processed.

We have also discovered that the two transposed population files ("persons with children in the household" and "persons with no children in the household") were utilized in processing SAN FRANCISCO and SAN JOSE data for the OCTOBER report period. As audience estimates were based on these population estimates, reported audience estimates were understated in some instances and overstated in other instances.

Revised OCTOBER 2008 SAN FRANCISCO and SAN JOSE audience estimates and data, based on appropriate population estimates, will also release this FRIDAY (12/5) at NOON PT.

Audience estimates for other markets were not affected in any way.

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