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

[Berton Gunter]

???
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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