A focused information criterion for graphical mode

Authors: Eugen Pircalabelu Gerda Claeskens Lourens Waldorp

Publish Date: 2014/09/02

Volume: 25, Issue: 6, Pages: 1071-1092

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Abstract

A new method for model selection for Gaussian Bayesian networks and Markov networks with extensions towards ancestral graphs is constructed to have good mean squared error properties The method is based on the focused information criterion and offers the possibility of fitting individualtailored models The focus of the research that is the purpose of the model directs the selection It is shown that using the focused information criterion leads to a graph with small mean squared error The low mean squared error ensures accurate estimation using a graphical model here estimation rather than explanation is the main objective Two situations that commonly occur in practice are treated a datadriven estimation of a graphical model and the improvement of an already prespecified feasible model The search algorithms are illustrated by means of data examples and are compared with existing methods in a simulation studyThe authors wish to thank the reviewers for their constructive comments E Pircalabelu and G Claeskens acknowledge the support of the Fund for Scientific Research Flanders KU Leuven grant GOA/12/14 and of the IAP Research Network P7/06 of the Belgian Science Policy The computational resources and services used in this work were provided by the VSC Flemish Supercomputer Center funded by the Hercules Foundation and the Flemish Government department EWI

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