How Search Engines Might View Outbound Links
Many people are afraid to link out to related resources throughout their copy. Many search engines grade pages not only based upon their copy and inbound links, but also upon the pages that they link to. All of your outbound links should not be link trades in one corner of your site. Try to naturally mix to quality sites in your site architecture wherever it makes sense.
A few years ago, in a forum thread, Google’s Matt Cutts said:


Interviews
SEO Community