Hello,

I've done quite a bit of search and have not been able to find
information on how to fit a model with heteroscedastic error variances.
For example, I would like to fit a simple model with genotypes
crossclassified across locations and heterogeneous residual variances.

It looks like the functionality was there in lme but not anymore in
lmer. Are there any workarounds or new packages (lme4a, Bayesian, ...)
that can do this type of analyses?

Thanks in advance!

Fernando

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