Identifying exogenous and endogenous activity in social media

  title={Identifying exogenous and endogenous activity in social media},
  author={Kazuki Fujita and Alexey N. Medvedev and Shinsuke Koyama and Renaud Lambiotte and Shigeru Shinomoto},
The occurrence of new events in a system is typically driven by external causes and by previous events taking place inside the system. This is a general statement, applying to a range of situations including, more recently, to the activity of users in Online social networks (OSNs). Here we develop a method for extracting from a series of posting times the relative contributions of exogenous, e.g. news media, and endogenous, e.g. information cascade. The method is based on the fitting of a… 

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