> From: rossini@blindglobe.net (A.J. Rossini) > Date: 01 Nov 2000 07:47:21 -0800[...]> Thanks for the pointer to stack/unstack -- now, having been reminded, > I think I'd seen these float through on the list (still doesn't solve > the missing modeling routines (parametric GLMMs, some of the > econometrics stuff -- does R _easily_ do 3SLS?), but they'll appear > sometime, I assume).Only if someone is interested enough to write them.... Actually, I thought parametric GLMMs were an unsolved research problem in general, even in, say, the logistic case. I know there are suggestions in special cases (and there is a glmm function in one of Jim Lindsey's packages) but all the simple ones can be seriously incorrect AFAIK. -- Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
>>>>> "PBR" == Prof Brian Ripley <ripley@stats.ox.ac.uk> 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 unresolved... best, -tony -- A.J. Rossini Rsrch. Asst. Prof. of Biostatistics BlindGlobe Networks (home/default) rossini@blindglobe.net UW Biostat/Center for AIDS Research rossini@u.washington.edu FHCRC/SCHARP/HIV Vaccine Trials Net rossini@scharp.org FHCRC: M/Tu: 206-667-7025 (fax=4812) | Voicemail is pretty sketchy CFAR: W/F: 206-731-3647 (fax=3694) | Email is far better than phone UW: Th/F: 206-543-1044 (fax=3286) | Change last 4 digits of phone for fax -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._