R help - Jul 2002 - robust mixed effects models

I'd like to apply the ideas of
Pinheiro et al. (1997): "Robust Estimation in LInear Mixed Effects Models
using the Multivariate t-Distribution" and I'm wondering if the
EM-based
estimation described in that paper has been implemented by somebody in R
already (I'm assuming it's not yet available within the package nlme --
whose subtitle is "Fit and compare ==>Gaussian<== linear and
nonlinear
mixed-effects models")
Before venturing in EM-programming territory I thought I ask...

thank you

claudia

(I'm using R-1.4.1) 

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claudia tebaldi                                  NCAR  RAP
project scientist                                P.O. Box 3000
M-W-Th @FL (303) 497-2830                        Boulder, CO 80307
Tu-F   @ML (303) 497-1621                        tebaldi at ucar.edu
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> I'd like to apply the ideas of
> Pinheiro et al. (1997): "Robust Estimation in LInear Mixed Effects
Models
> using the Multivariate t-Distribution" and I'm wondering if the
EM-based
> estimation described in that paper has been implemented by somebody in R
> already
Have you checked
http://cm.bell-labs.com/cm/ms/departments/sia/project/mixedEffects/index.html
(and the NLME page it links to)?

RXO

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