Linking to authority / competitor website!? Yes or No?

[montauto]

Here is the dilema .... People say, don't be afraid to link to authority website! What if an authority website in particular niche is actually competing with you in the Search, but you do have a review profile there? Is it ok to link to that profile ? Should I include a no follow tag ? Another case : some other authority high ranked website competing in search with mine directly has a profile page for my company, but this authority website has blocked Google bot to crawl the profile page all the reviews there !? Can I still link to that page and will this be appreciated by Google ? Am I passing PR and link juice from my website to those direct comeptitors / authority websites ?

[irvingw]

if you link but nofollow google sees the association but you don't pass page juice so that is probably the best bet