[R] lme vs. lmer, how do they differ?

[S Ellison]

>>> "John Sorkin" <jsorkin at grecc.umaryland.edu> 10/09/2010 13:21:09 >>>
>What is the difference (or differences) between lme and lmer? Both
appear to perform mixed effects regression analyses.

>From a user's point of view:
- lme only accepts nested random effect; lmer handles crossed random
effects
- lme has a convenient methof of handling heteroscedasticity; lmer
doesn't.
- lme gives you p-values; lmer doesn't (there is explanation of why at
https://stat.ethz.ch/pipermail/r-help/2006-May/094765.html which, I
guess, should not be all that reassuring for lme users either)


Steve Ellison


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