Media Scheduling and Carry-over Effects:

ABSTRACT

The current U.S. recency-based scheduling model focuses entirely on the short-term effects of advertising, arguing that in competitive markets the data show that response to advertising dissipates rapidly. This approach leads to consistent moderate weight and near continuous scheduling. Others disagree. Adstock, a well-established concept in the United Kingdom, has been seeping into U.S. planning through globalization and marketing-mix modeling. It has introduced carry-over effects into U.S. TV schedling, which encourage GRP concentration, flighting, and less continuous advertising. We believe that the way Adstock is currently being used by U.S. agencies to modify GRP lay-down is seriously flawed, because it is based on a misunderstanding of what Adstock is. This paper wil explain what we consider to be the fallacy and pinpoint just what place, if any, Adstock can have in media scheduling.