Jordan McCollum blogs about Google's China expansion and its new Ad Traffic Quality Resource Center designed to help AdWords advertisers report and avoid bad clicks -- as well as communicate with advertisers about click fraud.
The post gets into how Google illustrates the subject visually. Google states that it automatically compensates for virtually all click fraud by using a click fraud rate it knows is too high. By creating "false positives" in click fraud, Google ensures that advertisers aren't overcharged. Google refers to this as "proactively detecting" click fraud.