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Abstract Details

Activity Number: 229
Type: Topic Contributed
Date/Time: Monday, July 30, 2012 : 2:00 PM to 3:50 PM
Sponsor: Health Policy Statistics Section
Abstract - #305444
Title: Modeling Latent Tie Strength in Social Networks Using Interaction Count Data
Author(s): Mauricio Sadinle*+
Companies: Carnegie Mellon University
Address: , Pittsburgh, PA, 15217,
Keywords: Online social networks ; Valued networks ; Count data ; Negative binomial model ; Latent variable model ; EM algorithm
Abstract:

We propose a model to measure latent tie strength between members of social networks. The motivation to do so is to have a more reliable measure of relationship between members of the network besides declared links. This methodology has applications to link predictions, item recommendation, newsfeeds, people search and other related tasks implemented in online social networks. The proposed model uses different types of count interaction data between members such as number of messages and chats. The intuition for the model is that the more interaction the larger the latent tie strength. We propose a mixture model that fits marginally the distribution of the observed interaction between users. Our model also allows the incorporation of covariates to explain the mean latent tie strength. We illustrate the usefulness of our model using data from the myGamma mobile social network.


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