Power of edge exclusion tests for graphical log-linear models

M. Fátima Salgueiro, Peter W.F. Smith and John W. McDonald

Journal of Multivariate Analysis, 2006, vol. 97, issue 8, 1691-1701

Abstract: Asymptotic multivariate normal approximations to the joint distributions of edge exclusion test statistics for saturated graphical log-linear models, with all variables binary, are derived. Non-signed and signed square-root versions of the likelihood ratio, Wald and score test statistics are considered. Non-central chi-squared approximations are also considered for the non-signed versions of the test statistics. Simulation results are used to assess the quality of the proposed approximations. These approximations are used to estimate the overall power of edge exclusion tests. Power calculations are illustrated using data on university admissions.

Keywords: Edge; exclusion; test; Graphical; log-linear; model; Model; selection; Odds; ratio; Overall; power (search for similar items in EconPapers)
Date: 2006
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Citations: View citations in EconPapers (1)

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