generalized linear mixed models with a beta distribution

You can fit this kind of model (and negative binomial) and more
difficult mixed models   with AD Model Builder's random effects module
which is now freely available at

     http://admb-project.org/

David A. Fournier
P.O. Box 2040,
Sidney, B.C. V8l 3S3
Canada
Phone/FAX 250-655-3364
http://otter-rsch.com