Do Affiliate links Affect Website Rankings ?

[Shahid]

Hi All Webmaster I want to ask one question that : How Affiliate links can affect your website rankings ? Affiliate website is having alexa rank 222500 & page rank is 1.
I have my own website & I am seeing that 16000 links are from one affiliate website.
I track this data from Google webmaster . Can anyone tell me that these amount of links are harmful or not.
I have checked links form this affiliate website is dofollow. Will dofollow links can have any impact on my website rankings.
Should I make these links nofollow, should i contact author of that website.

Please help me webmasters. I am in dilemma.

[Jake]

I'm not sure, on principle Google doesn't like affiliate links but I can't say that the automated ranking system singles them out, more likely he added traffic reported by 3rd party services like Alexa are likely to be a slight boost. NoFollow were specifically t e used for paid traffic like ad network banners.

Further mixed comments from the thoughtful people at seoMoz
http://moz.com/community/q/does-an-affil...ndard-link

http://moz.com/community/q/does-having-a...s-hurt-seo