[Forum SIS] UNIBO Statistics Seminars

[Silvia Cagnone]

We are glad to announce the following  Statistics Seminar:


Thursday, May 10, 2.30 pm

Seminar Room, via delle Belle Arti 41, Bologna


Christian Brownlees (Universitat Pompeu Fabra)
Community Detection in Partial Correlation Network Models




Abstract:


Many real-world networks exhibit a community structure: The vertices of the network are partitioned into groups such that the concentration of linkages is high among vertices in the same group and low otherwise. This motivates us to introduce a class of partial correlation network models with a community structure that replicates this empirical regularity. A natural question that arises in this framework is how to detect the communities from a random sample of observations. We introduce an algorithm called Blockbuster that recovers the communities using the eigenvectors of the sample covariance matrix. We study the properties of the procedure and establish consistency. The methodology is used to study real activity clustering in the U.S. and Europe.


Contact person: Alessandra Luati


The schedule of the statistics seminars are available at http://www.stat.unibo.it/it/dipartimento/seminari-di-statistica-2018




Silvia Cagnone
Department of Statistical Sciences "Paolo Fortunati"
University of Bologna
Via delle Belle Arti 41 - 40126  Bologna,  ITALY
Tel: +39 051 2098213  Fax: +39 051 232153
http://www2.stat.unibo.it/cagnone/

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