Network shows get ratings boost from seven-day system

10/13/2009 | NYTimes.com

NBC's "Heroes" is among the prime-time shows to derive a significant audience boost from live-plus-seven day ratings. The show's audience was 26% bigger when the additional viewing days were included versus looking just at the day after the season premiere, and its numbers in the key 18-to-49 demographic grew from a 2.8 rating to a 3.7.

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