[Forum SIS] DEC statistics seminar - March 9th. Charles Bouveyron

[Raffaella Piccarreta]

Dear all, 

We are glad to announce the next: 







DEC - Statistics Seminar 

Thursday, 9th March 2017 

Bocconi University, 

Room 3-E4-SR03 

Via Rontgen 1 - 3rd floor 

Time: 12:30 pm 



Charles Bouveyron 

Université Paris Descartes & Sorbonne Paris Cité 



The Stochastic Topic Block Model for the Clustering of Vertices in Networks with Textual Edges 





Abstract: Due to the significant increase of communications between individuals via social media (Facebook, Twitter, Linkedin) or electronic formats (email, web, e-publication) in the past two decades, net-work analysis has become a unavoidable discipline. Many random graph models have been proposed to extract information from networks based on person-to-person links only, without taking into account information on the contents. This paper introduces the stochastic topic block model (STBM), a probabilistic model for networks with textual edges. We address here the problem of discovering meaningful clusters of vertices that are coherent from both the network interactions and the text contents. A classification variational expectation-maximization (C-VEM) algorithm is proposed to perform inference. Simulated data sets are considered in order to assess the proposed approach and to highlight its main features. Finally, we demonstrate the effectiveness of our methodology on two real-word data sets: a directed communication network and an undirected co-authorship network. 

Joint work with P. Latouche and R. Zreik 







Kind regards, 

Raffaella Piccarreta and Isadora Antoniano 







The DEC statistics seminars schedule is available at http://www.unibocconi.eu/statseminar 



ATTENTION: 

If you are a guest and you do not have a Bocconi ID Card to access to the Bocconi Buildings, please confirm your participation by sending an email to simona.gagino a unibocconi.it 
In addition, we suggest to print, fill out and send the attached form (to give your consent to personal data handling) via email to the same address. In this way, the check-in procedure at the entrance will be faster and easier. 






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Raffaella Piccarreta 
Associate Professor - Statistics 
DEC - Department of Decision Sciences, 
Universita' L.Bocconi, via Guglielmo Röntgen 1 (3rd floor, room D1-09). 20136, Milano. 
email: piccarreta a unibocconi.it 
tel. +39-02-58365659 / fax +39-02-58365630 

Web page (ENGLISH VERSION): http://faculty.unibocconi.eu/raffaellapiccarreta/ 
(ITALIAN VERSION): http://faculty.unibocconi.it/raffaellapiccarreta/ 
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