Analyzing my Facebook Graph

Enki 2/22/2012
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Tonight I did a manual graph analysis of my Facebook network: Turns out among nodes with a degree of at least 13, there exist three clearly distinct subgraphs. They probably are most appropriately named The Institute, YCombinator and Future Camp.

Centrality ("who is connected to almost everyone else in the subgraph") seems to follow different rules in all three subgraphs. E.g. in the YC graph very successful founders seem to be more connected than less successful founders, and those in turn are generally more connected than employees.

In the two other subgraphs centrality seems to be more socially motivated. Intuitively I feel that it's different rules that govern centrality in The Institute and Future Camp, but I don't understand it well enough to even attempt to put in words. It's clear that seeing only part of the graph (my perspective) adds a lot of noise that makes this data unreliable.

Finally, what I noticed is that I am somewhat fascinated with people who have high in-betweenness. That is, people that are connected to two or more subgraphs that I'm also connected to, but don't necessarily have a high number of total connections. I don't know exactly why, but probably because they are exposed to a wider range of ideas?

In conclusion, exploring this data was fun. I don't think I'm any wiser yet, but I'd certainly like to explore more how centrality and in-betweenness are correlated (first impression: negatively), and if there's anything else I can learn from this.

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