hunderdown - 8:53 pm on Apr 22, 2005 (gmt 0)

An advertiser with a big budget jumping in and out of the content sites to test ROI might explain big swings up and down.

Or adjustments to the Smart Pricing algorithm that overshoot, with the next adjustment overshooting in the other direction?

I tend to think you need to look at entire months if you're going to find real long-term trends. There's too much daily and weekly up and down...