Advertising Age Article Abstract
Nielsen Admits Big Problems With How Its Technology Measures Web
Clients Say Discrepancies Extend Beyond Three-Month Glitch It's Reported
NEW YORK (AdAge.com) -- Last week Nielsen Co. made a stunning disclosure, announcing that a computer glitch triggered by long web addresses used by social networks was tripping up the system and causing the company to underestimate the time people spend on the web by an average of 22%. As executives at Nielsen investigated that problem, they found others. ...