[R] Conservative "ANOVA tables" in lmer

Andrew Robinson A.Robinson at ms.unimelb.edu.au
Sun Sep 10 07:56:24 CEST 2006

On Thu, Sep 07, 2006 at 07:59:58AM -0500, Douglas Bates wrote:

> I would be happy to re-institute p-values for fixed effects in the
> summary and anova methods for lmer objects using a denominator degrees
> of freedom based on the trace of the hat matrix or the rank of Z:X if
> others will volunteer to respond to the "these answers are obviously
> wrong because they don't agree with <whatever> and the idiot who wrote
> this software should be thrashed to within an inch of his life"
> messages.  I don't have the patience.

This seems to be more than fair to me.  I'll volunteer to help explain
why the anova.lmer() output doesn't match SAS, etc.  Is it worth
putting a caveat in the output and the help files?  Is it even worth
writing a FAQ about this?


Andrew Robinson  
Department of Mathematics and Statistics            Tel: +61-3-8344-9763
University of Melbourne, VIC 3010 Australia         Fax: +61-3-8344-4599
Email: a.robinson at ms.unimelb.edu.au         http://www.ms.unimelb.edu.au

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