Do Tradedoubler Ads Have A Negative Affect On Google Ranking?

[energylevel]

Is there any firm evidence that Tradedoubler or any other affliate ads do have a negative impact on a site's rank in Google?

[tedster]

I never heard of even weak evidence, to say nothing of firm evidence.

[europeforvisitors]

Google has made it clear in the past that it has no objection to affiliate links per se, but "thin affiliate" sites or pages are in its gunsights.

[energylevel]

I suppose linking out to a bad site by virtue of an affiliate link could hurt ......

[europeforvisitors]

I suppose linking out to a bad site by virtue of an affiliate link could hurt ......

That brings up an interesting question: Would it be helpful to use rel="nofollow" in straight HTML affiliate links?

[annej]

I do, seems like an appropriate use of nofollow.