Kinsey Wilson on the effectiveness of online ads.:
The market already has taken these differences into account. The New York Times, for example, charges a $20 CPM (cost per thousand ad impressions) for old-style banners, a $30 CPM for vertical banners and leader boards, and $40 for its poster units. That latter highest rate also covers the half-page ad, pioneered by the Times in April 2003 and mimicked by other sites — consistent with Eyetrack’s findings that size and proximity to editorial content yield better performance.
A washington Monthly forum on What if Bush wins?