[Rd] Re: desiderata for data manipulation
01 Nov 2000 08:09:59 -0800
>>>>> "PBR" == Prof Brian Ripley <email@example.com> writes:
PBR> Only if someone is interested enough to write them....
Exactly, that's why I said eventually.
PBR> Actually, I thought parametric GLMMs were an unsolved
PBR> research problem in general, even in, say, the logistic case.
PBR> I know there are suggestions in special cases (and there is a
PBR> glmm function in one of Jim Lindsey's packages) but all the
PBR> simple ones can be seriously incorrect AFAIK.
I'll have to follow up on Jim's packages, which have always seemed
daunting, and run some comparisons.
As far as research problems -- yes, how to fit the semiparametric
version of the GLMMs is open, but for a fully parametric version,
there isn't much of an issue.
You are right that interpretation is severely problematic and needs
to be handled with care (Thomas has a nice presentation on that) but
they can be useful tools during data analysis.
Okay, maybe I should just take off a day or two in the next week and
see if most of Stata can be replaced by R :-), since we've made good
progress on a number of issues I had previously thought were
A.J. Rossini Rsrch. Asst. Prof. of Biostatistics
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