Online Display CPMs Plummet, New 'Secondary Premium' Ad Market Emerges

The price of online display advertising inventory sold via advertising networks fell in the "20% to 30%" range during the first quarter of 2009 vs. the fourth quarter of 2008, according to estimates released Tuesday by the Rubicon Project. The estimates, which come from Rubicon's fifth Advertising Market Report, do not yet disclose the impact on year-over-year pricing, and Rubicon...