AMS includes an extensive statistics program that tracks the number of times each adbar is displayed, as well as the number of times each is clicked on. To log into the AMS statistics panel (ams_stats.cgi), use the same username/password combination that you use to log into the administration panel (or you can log into the administration panel, then click on the link at the bottom that says "AMS Statistics System"). The location of the ams_stats.cgi script is in the same directory as your administration panel, which in many cases will be:
/cgi-bin/ams/ams_stats.cgi
Once logged in, you will see a panel that says "Advertiser Comparison". You can choose from running a comparison "By Exposures", "By Click-Throughs", or "By Click-Through to Exposure Ratio". By choosing "By Exposures", you can examine traffic weighting to see if there are adbars that aren't getting displayed enough. You can also measure the effectiveness of adbars with a "By Click-Through to Exposure Ratio" comparison.
At the bottom of the statistics panel you can choose an advertiser entry to get the same statistics on it individually. If you select an advertiser and click the "Set Access" button, you'll be able to give advertisers access to their statistics.
