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
Google rolls out pay-per-value AI licensing program to publishers
Google has been quietly scaling a pay-per-value AI licensing scheme for publishers. But critics say the program looks less like a meaningful payout and more like a legal fig leaf.
What we’ve learned from the creator snafus at this year’s US Open
Everyone’s hating on creators at the US Open, but they’re here to stay in the tennis world, just perhaps with some adjustments.
Molson Coors ditches its TV-era workflow to move at creator speed, quadrupling engagement
Molson Coors partnered with Movers+Shakers’ new consultancy group to completely overhaul its approach to creators, and it’s working.