NEW YORK (AP) — The Nielsen company has delayed its ratings for Los Angeles radio stations because it found an employee of a Univision-owned radio station was cheating the system.

Nielsen strictly forbids employees of media organizations from participating in its measurement system. But the company said Monday that an employee of KSCA radio station had misrepresented himself to become part of Nielsen’s sample audience, and reported that he’d been listening to a lot of KSCA.

Nielsen said Monday the company is recalculating its Los Angeles radio rating so that the KSCA radio employee’s preferences aren’t included.

Univision Radio President Jose Valle said the employee, who was not identified, has been fired.

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