{ Tuesday, December 15, 2009 }
In the comments on Chris's blog (great post today about search and social graphs) -- Sean O'Rourke mapped out some interesting points regarding Social Graphs when used for Search, and I think he's nailed the numbers:
_x_ Size of social graph (what is average?)
__% of graph accessible on given platform
__% of people with familiarity of a topic (some)
__% of people with expertise on a topic (few)
__% of people who care enough to review topic
__% of people who have already reviewed, or
__% of people who can review quickly for you
_?_ ability to triangulate all of the opinions
You can estimate the first two, but the rest is highly speculative. Let's say the average social graph is The Dunbar Number, around 150 people. For a platform, let's use Twitter: the average user has 126 followers. This is probably skewed, given power law distribution. If you shaved off the top 10% of users to try to find the average user, you'd get something south of that I'm sure. In Q4 2008 about a third (35%) of Twitter users had 10 or fewer followers, with the average number of followers for all users at 70.
LINK | 11:41 AM | TB
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