According to Click Fraud Index, as high as a quarter of all clicks for high priced search terms could be fraud. The report findings show that the industry average of click frauds has gone up from 13.7 percent in the first quarter of 2006 to 14.8 percent for the same period in 2007.

The figures for the content network are higher at 21.9 percent. But the highest rates of click frauds are for terms priced above $2.00. The industry average in this segment stands at 22.2 percent.

The authenticity of the data has been questioned by Shuman Ghosemajumder from Google. In response to that Tom Cuthbert, President and CEO, has explained the nitty gritties of click fraud in a blog post.

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