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What Stops Social Epidemics?
Published on Aug 18, 20113386 Views
Theoretical progress in understanding the dynamics of spreading processes on graphs suggests the existence of an epidemic threshold below which no epidemics form and above which epidemics spread to a
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Chapter list
What Stops Social Epidemics?00:00
Information, viruses, etc. spread from node to node on a network00:20
What is an epidemic?, Information cascades differ01:20
What is an epidemic? (graph)02:07
Social news: digg03:03
Distribution of cascade size on digg04:00
Why are these cascades so small?04:47
Maybe graph structure is responsible?05:40
What about the spreading mechanism?07:50
How important are repeat exposures?09:01
How do people respond to repeated exposure?09:43
Big consequences for epidemic growth10:46
Weak response to repeated exposure11:06
Also explains dynamics12:20
Transmissibility: the percentage of new people exposed who end up infected/voting13:31
Structure + Behavior14:58
Summary16:13