Actually, Google has an Adwords tools which allow you to estimate what it would cost you to run an ad.
IIRC, that has estimated Cost Per Click (CPC) and Cost Per Thousand (CPM) columnns, along with estimated impressions and a sweet API to pull it all together.
Many people estimate Google takes a 20-40% rip from the advertiser, and gives the adsense guy the rest of the payout. So from that you can estimate what the adsense ads pay.
How much Google takes is not confidential, you can compute it from their SEC filings. Would you believe that they take 70% of the advertiser's money, and give back 30% to the site owner?
IIRC, that has estimated Cost Per Click (CPC) and Cost Per Thousand (CPM) columnns, along with estimated impressions and a sweet API to pull it all together.
Many people estimate Google takes a 20-40% rip from the advertiser, and gives the adsense guy the rest of the payout. So from that you can estimate what the adsense ads pay.