According to a new report by MediaMind, conventional audience measurement metrics that do not adjust for user cookie deletion overestimate the number of unique users by up to threefold. MediaMind’s method of measurement, the adjusted unique, divides the number of total impressions by the average frequency of cookie deletion. The study was based on 26 billion impressions served in the U.S. and Europe from January to December 2010.

More in Media
Why Amazon and YouTube pitched operating systems, not just TV inventory at this year’s upfront
Negotiations over identity, infrastructure, AI-driven buying take place as much as programing.
The Economist prepares for a two‑track internet: one for humans and one for AI agents
The Economist is testing agent-readable versions of content that already sits outside its paywall, as it prepares for “two versions of the web.”
Amazon bets creator video podcasts can be the next TV network – if it can fix measurement
Amazon’s Upfront presentation leaned into its podcast offerings, which the company believes are the next generation of TV networks.