[R] empirical (sandwich) SE estimate in lme ()?

[A.J. Rossini]

Right, but you still can sandwich them if you want.  

(I recently did that in Proc MIXED, but Michael, I'm not sure how to
do it using lme).

best,
-tony


On Fri, 14 Jan 2005 11:16:10 -0800, Berton Gunter
<gunter.berton at gene.com> wrote:
> ???
> correlated within group errors are explicitly modeled by corStruct classes.
> See ?lme and Chapter 5.3 in Bates and Pinheiro.
> 
> -- Bert Gunter
> Genentech Non-Clinical Statistics
> South San Francisco, CA
> 
> "The business of the statistician is to catalyze the scientific learning
> process."  - George E. P. Box
> 
> 
> > -----Original Message-----
> > From: r-help-bounces at stat.math.ethz.ch
> > [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Na Li
> > Sent: Friday, January 14, 2005 8:42 AM
> > To: r-help at stat.math.ethz.ch
> > Subject: [R] empirical (sandwich) SE estimate in lme ()?
> >
> >
> > Is it possible to get the empirical (sandwich) S.E. estimates for the
> > fixed effects in lme () (thus allowing possibly correlated
> > errors within
> > the group)? In SAS you can get it by the 'empirical' option
> > to PROC MIXED.
> >
> > Cheers,
> >
> > Michael
> >
> > --
> > Na (Michael) Li, Ph.D.
> > Division of Biostatistics          A443 Mayo Building, MMC 303
> > School of Public Health            420 Delaware St SE
> > University of Minnesota            Minneapolis, MN 55455
> > Phone: (612) 626-4765              Email: nali at umn.edu
> >
> > Fax:   (612) 626-0660              http://www.biostat.umn.edu/~nali
> >
> > ______________________________________________
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> 
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-- 
best,
-tony

"Commit early,commit often, and commit in a repository from which we can easily
roll-back your mistakes" (AJR, 4Jan05).

A.J. Rossini
blindglobe at gmail.com