68 citations · 166 across the 14 of their papers we have counts for
Showing 2018Show all
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physics.soc-ph2018★ 20 cited
Identifying exogenous and endogenous activity in social media
Kazuki Fujita, Alexey Medvedev, Shinsuke Koyama +2
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 ra…
stat.ME2018★ 3 cited
Modeling event cascades using networks of additive count sequences
Shinsuke Koyama, Yoshi Fujiwara
We propose a statistical model for networks of event count sequences built on a cascade structure. We assume that each event triggers successor events, whose counts follow additive…