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

Na Li nali at umn.edu
Fri Jan 14 17:41:44 CET 2005


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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