Mixed-model-binary logistic model with dependence between individual repeated measures
On Fri, 2011-01-07 at 11:49 -0500, Ben Bolker wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
<snip />
I do not
want to assume that. In addition I would like to be able to chose other distributions than the normal for my random effect, which is not possible in SAS (proc NLMIXED).
It's not possible in R either as far as I know.
I was reading the article in the latest issue of the R Journal on the hglm package, and although I was only giving it a cursory scan over lunch it looks like it might be able to fit the sort of model implied here; random effects distributed as a member of the exponential family. G
The generalized estimating
equation packages are probably not an option as I do not whant marginal models. I will look at the references you suggested. Thank you. /Anna
If you want a non-marginal model with non-normal random effects and
within-individual correlation structures other than compound symmetry
(i.e. simple block structures), you are probably going to have to
construct your own solution with WinBUGS or AD Model Builder or ... ? If
you're lucky, MCMCglmm may be able to do what you want -- I would check
it out. (Molenbergh and Verbeke's book on longitudinal models describes
approaches for non-normal random effects, but in the context of LMMs
(i.e. normally distributed errors) -- they may have done something to
extend this stuff to GLMMs more recently. It's possible that someone
out there has done what you want and encapsulated it into a canned
package, but I doubt it.
cheers
Ben Bolker
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
iEYEARECAAYFAk0nRBsACgkQc5UpGjwzenPr6wCfb7wixKYRGfglmge7Ejg0+i26
k5QAoJpuc+QiWC8iaMXC6aDnW75GfrYE
=292C
-----END PGP SIGNATURE-----
_______________________________________________ R-sig-mixed-models at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%