The Media Rating Council (MRC) accredited (2/5) Arbitron’s AQH monthly PPM ratings data in four more markets including Chicago, San Francisco, San Diego and Charlotte. In 14 other metros MRC voted to continue accreditation. The total number of markets that MRC accredits is now 18. MRC adds that Arbitron still has issues to work out in 30 other cities for accreditationThe Media Rating Council (MRC) accredited the AQH monthly PPM ratings data in four more markets including Chicago, San Francisco, San Diego and Charlotte. In 14 other metros MRC voted to continue accreditation. The total number of markets that MRC accredits is now 18. MRC adds that Arbitron still has issues to work out in 30 other cities for accreditation
