August 2006 – Multipliers are often used by public relations professionals to factor circulation or audience figures when calculating impressions. Multipliers are generally rationalized by users to take into account pass-along circulation and/or to assign a higher value to PR impressions than advertising impressions due to a perceived higher level of credibility. The authors argue that the facts do not support the use of multipliers, and their use may actually hurt the credibility of the profession.
Dispelling the Myth of PR Multipliers and Other Inflationary Audience Measures
Mark Weiner and Don Bartholomew