Nielsen PPM Accreditation Revoked in Four Major Markets
A top ten market is among four that have lost the industry's seal of approval for Nielsen's PPM ratings. The Media Rating Council revoked accreditation in a September decision, adding another strain to a currency already under review after a pause on the accreditation of Nielsen'

A top ten market is among four that have lost the industry's seal of approval for Nielsen's PPM ratings. The Media Rating Council revoked accreditation in a September decision, adding another strain to a currency already under review after a pause on the accreditation of Nielsen's diary service.
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