[R] What happen for Negative binomial link in Lmer

[Ben Bolker]

Patrick Giraudoux wrote:
> 
> Seems the message below and the thread have reveived no attention/answer.
> The output presented is quite tricky. Looks like if lmer (lme4 0.9975-10) 
> has accepted a negative binomial link with reasonable estimates, although
> it was not designed for... 
> 
> What can one think about result validity ?
> 
> 

Well, I can believe that lme4 0.9975-10 may have allowed families that were
not
hard-coded (e.g., negative binomial with a fixed overdispersion parameter).
I would expect the results to be reasonable.  However, lme4 has gone through
a lot of changes. If you have an old copy around and your results pass all
the
sanity checks you can think of, I might go ahead and use them -- otherwise
you will have to deal with glmmADMB, WinBUGS, AD Model Builder
(or lme4 with quasipoisson family) ...


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