Social Media Algorithms
by Josh Schreibman on Jul.03, 2008, under Algorithms
Have you ever wondered how social network sites like reddit, stumbleupon and del.icio.us rank content, and decide which stories to display on the home page? Me too.
SEOmoz has the scoop, and has published an interesting article exposing these famous algorithms.
As you would expect, most rankings are based on the number of votes, versus the time elapsed, and can be reduced to something extremely simple, such as the Hacker News algorithm:
(p – 1) / (t + 2)^1.5
Where p is the number of votes (points) from users, and t is the time elapsed (in seconds) since the article was submitted
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September 18th, 2008 on 1:30 am
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