#  App Stats: Perry on "Point process modeling for directed interaction networks" 

 





April 11, 2011

 

 

We hope that you can join us for the [Applied Statistics Workshop](http://www.iq.harvard.edu/events/node/1208) this Wednesday, April 13th, 2011 when we will be happy to finally have [Patrick Perry](http://ptrckprry.com/) from the [Statistics and Information Sciences Laboratory](http://sisl.seas.harvard.edu). This is a talk rescheduled from earlier in the term when the weather was much worse. You will find an abstract for the [paper](http://arxiv.org/abs/1011.1703). As always, we will serve a light lunch and the talk will begin around 12:15p.

“Point process modeling for directed interaction networks”   
Patrick Perry   
Statistics and Information Sciences Laboratory   
CGIS K354 (1737 Cambridge St.)   
Wednesday, April 13th, 2011 12 noon

Abstract:

> Network data often take the form of repeated interactions between senders and receivers tabulated over time. Rather than reducing these data to binary ties, a model is introduced for treating directed interactions as a multivariate point process: a Cox multiplicative intensity model using covariates that depend on the history of the process. Consistency and asymptotic normality are proved for the resulting partial-likelihood-based estimators under suitable regularity conditions, and an efficient fitting procedure is described. Multicast interactions—those involving a single sender but multiple receivers—are treated explicitly. A motivating data example shows the effects of reciprocation and group-level preferences on message sending behavior in a corporate e-mail network.

Posted by [Matt Blackwell](http://www.iq.harvard.edu/blog/sss/archives/author/matt-blackwell/) at April 11, 2011 9:48 AM



 

 

 



 

 

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