Operations, Information and Decisions Papers

Document Type

Journal Article

Date of this Version

2006

Publication Source

Journal of Computational and Graphical Statistics

Volume

15

Issue

3

Start Page

584

Last Page

608

DOI

10.1198/106186006X139162

Abstract

A dynamic network is a special type of network composed of connected transactors which have repeated evolving interaction. Data on large dynamic networks such as telecommunications networks and the Internet are pervasive. However, representing dynamic networks in a manner that is conducive to efficient large-scale analysis is a challenge. In this article, we represent dynamic graphs using a data structure introduced in an earlier article. We advocate their representation because it accounts for the evolution of relationships between transactors through time, mitigates noise at the local transactor level, and allows for the removal of stale relationships. Our work improves on their heuristic arguments by formalizing the representation with three tunable parameters. In doing this, we develop a generic framework for evaluating and tuning any dynamic graph. We show that the storage saving approximations involved in the representation do not affect predictive performance, and typically improve it. We motivate our approach using a fraud detection example from the telecommunications industry, and demonstrate that we can outperform published results on the fraud detection task. In addition, we present a preliminary analysis on Web logs and e-mail networks.

Copyright/Permission Statement

This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Computational and Graphical Statistics on 01 Jan 2012, available online: http://wwww.tandfonline.com/10.1198/106186006X139162.

Keywords

approximate subgraphs, dynamic graphs, exponential averaging, fraud detection, link prediction, statistical relational learning, transactional data streams

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Date Posted: 27 November 2017

This document has been peer reviewed.