This article discusses a latent variable model for inference and prediction of symmetric relational data. The model, based on the idea of the eigenvalue decomposition, represents the relationship between two nodes as the weighted inner-product of node-specific vectors of latent characteristics. This "eigenmodel" generalizes other popular latent variable models, such as latent class and distance models: It is shown mathematically that any latent class or distance model has a representation as an eigenmodel, but not vice-versa. The practical implications of this are examined in the context of three real datasets, for which the eigenmodel has as good or better out-of-sample predictive performance than the other two models.
Modeling homophily and stochastic equivalence in symmetric relational data
Published 2007 in Neural Information Processing Systems
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- Publication year
2007
- Venue
Neural Information Processing Systems
- Publication date
2007-11-07
- Fields of study
Mathematics, Computer Science
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