[R] lmer4 and variable selection
Prof Brian Ripley
ripley at stats.ox.ac.uk
Mon Aug 25 20:29:36 CEST 2008
On Mon, 25 Aug 2008, jebyrnes wrote:
> Have you thought about using AIC weights? As long as you are not considering
> models where you drop your random effects, calculating AIC values (or AICc
> values) and doing multimodel inference is one way to approach your problem.
> If you are fitting models with and without random effects, it gets trickier
> - see Vaida and Blanchard 2005 Biometrika.
Also if you are setting variances to zero ....
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> and provide commented, minimal, self-contained, reproducible code.
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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