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2 months of L.A. radio data may be wrong, Nielsen says
2 months of L.A. radio data may be wrong, Nielsen says

In an unprecedented move, ratings giant Nielsen acknowledged problems with its audience estimates for Los Angeles radio stations. Nielsen conceded on Wednesday that two months of ratings data might have been compromised because of undisclosed problems with members of the firm's sample audience. The company this week delayed the release of its May radio ratings, saying it needed time to perform "quality control reviews." Nielsen also said it needed to recalculate April's ratings. The disclosure rocked the region's radio stations, which rely heavily on Nielsen's numbers to set their advertising rates. Los Angeles is the nation's largest radio market, as...

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