… four networks representing archetypical examples of social structures: members of LiveJournal.com; email contacts in the computer science department at University College London; inpatients of Swedish hospitals, and adult film actors. … I always say that the most important people you bring into your social network are your first 20, then your next 200, then your next 2000 — and by that time the DNA of your community has already been defined, especially since word of …
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Proximity to Core Determines Social Network Influence — Chris Abraham