Conditional Independence in Dynamic Networks

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LERNER, Jürgen, Natalie INDLEKOFER, Bobo NICK, Ulrik BRANDES, 2013. Conditional Independence in Dynamic Networks. In: Journal of Mathematical Psychology. 57(6), pp. 275-283. ISSN 0022-2496. eISSN 1096-0880. Available under: doi: 10.1016/

@article{Lerner2013Condi-25992, title={Conditional Independence in Dynamic Networks}, year={2013}, doi={10.1016/}, number={6}, volume={57}, issn={0022-2496}, journal={Journal of Mathematical Psychology}, pages={275--283}, author={Lerner, Jürgen and Indlekofer, Natalie and Nick, Bobo and Brandes, Ulrik} }

Journal of Mathematical Psychology ; 57 (2013), 6. - S. 275-283 Indlekofer, Natalie Given a longitudinal network observed at time points t1<⋯<tT, tie changes that happen in the interval (th,th+1) typically depend on the networks at t1,…,th. In this article we deal with the question whether changes within one interval mutually depend on each other or whether they are conditionally independent, given the previously observed networks. Answering this question for given data is of high practical relevance since, if the conditional independence assumption is valid, network dynamics can be modeled with simple and computationally efficient statistical techniques for independent observations. Consequently, we propose a framework to systematically compare conditional independence models with more general models that are specifically designed for social network data. Our results suggest that conditional independence models are inappropriate as a general model for network evolution and can lead to distorted substantive findings on structural network effects, such as transitivity. On the other hand, the conditional independence assumption becomes less severe when inter-observation times are relatively short. 2014-01-29T08:19:07Z eng 2013 Brandes, Ulrik Nick, Bobo Nick, Bobo Conditional Independence in Dynamic Networks Indlekofer, Natalie 2014-01-29T08:19:07Z Lerner, Jürgen Brandes, Ulrik terms-of-use Lerner, Jürgen

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