Arbitron Incorporated
Nielsen confirms 'inconsistencies' with Los Angeles radio ratings

In an unprecedented move, ratings giant Nielsen has acknowledged problems with its audience estimates in recent months for Los Angeles radio stations. Earlier this week, Nielsen delayed the release of its May radio ratings, saying it needed more time to perform "quality control reviews" because of concerns that its audience estimates might have been compromised. On Wednesday, Nielsen acknowledged that the problems were probably more extensive. Nielsen said it would revise the ratings issued for April because those numbers also appeared to be tainted. "After reviewing preliminary data for the Nielsen Audio Los Angeles PPM market, we discovered inconsistencies with the...