How to tell the difference from a sponsored vs. regular click.

[michaelday]

I'm not sure how to distinguish in my log files between sponsored yahoo click and regular yahoo click since for many keywords and phrases my site shows up as both sponsored and regualar listing. There appears to be some difference between [search.yahoo.com...] and
[search.yahoo.com...] but I'm not sure if it is definitive.

[SmallTime]

Overture suggests using a tracking url (see them for info) - works well

[michaelday]

I was actually looking for a way to tell the difference without the overture tracking url.

[shuffler]

You could set up an identical page just for PPC, and them examine the referral data only on the relevant pages

[SmallTime]

the //srd.yahoo.com/.. strings are not overture, but the other 4 or five variations can be or not. why not use tracking urls?