Scholars, advertisers and political activists see massive online socialnetworks as a representation of social interactions that can be used to studythe propagation of ideas, social bond dynamics and viral marketing, amongothers. But the linked structures of social networks do not reveal actualinteractions among people. Scarcity of attention and the daily rythms of lifeand work makes people default to interacting with those few that matter andthat reciprocate their attention. A study of social interactions within Twitterreveals that the driver of usage is a sparse and hidden network of connectionsunderlying the declared set of friends and followers.


[0812.1045] Social networks that matter: Twitter under the microscope

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