There&#x27;s these two for HN:<p><a href="http:&#x2F;&#x2F;blog.datadive.net&#x2F;which-topics-get-the-upvote-on-hacker-news&#x2F;" rel="nofollow">http:&#x2F;&#x2F;blog.datadive.net&#x2F;which-topics-get-the-upvote-on-hack...</a><p><a href="http:&#x2F;&#x2F;insightmine.com&#x2F;hacking-y-combinator&#x2F;" rel="nofollow">http:&#x2F;&#x2F;insightmine.com&#x2F;hacking-y-combinator&#x2F;</a>