During primetime in the fourth quarter of 1998, NBC averaged 14 1/2 minutes of non-program time, according to the latest Alliance Clutter Report, a joint study by WPP Group sibling shops J. Walter Thompson USA and Ogilvy & Mather Worldwide. In all, the broadcast networks increased their prime-time non-program time 5% over the previous quarter to an average of 14 minutes per hour. ABC averaged the most prime-time network commercials during the quarter with 10 minutes each hour. The networks averaged 9 1/2 minutes of national ads per hour, up 7% over the
Copyright March 1999, Crain Communications Inc.