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It’s finally official: Nielsen’s national TV service, which has long served as a crucial measurement backbone for the television media industry, will no longer be third-party accredited by the independent Media Rating Council effective later this month, the organization said today.
The decision from the MRC, which evaluates and accredits measurement tools to ensure figure accuracy and reliability for the advertising community, marks a stunning blow to Nielsen, capping off months of controversy over the accuracy of Nielsen’s audience figures.

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