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Re: st: need help with gllamm ordered probit models


From   Steven Samuels <sjsamuels@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: need help with gllamm ordered probit models
Date   Sun, 29 May 2011 14:10:49 -0400

Lisa-

All of the examples in the GLLAMM manual of link(oprobit) use family(binomial).

Steve
sjsamuels@gmail.com


On May 29, 2011, at 1:52 PM, Lisa Marie Yarnell wrote:

Hello!  I have run ordered probit models in the past using svy: oprobit.  Those have worked great for me.  But now, I am trying to run ordered probit models using gllamm so that I can nest persons within schools (scid), and I am stumped.  Even in a very basic model (below), I receive error messages.  Do I need to specify the number of random effects, which I have seen on help pages indicated as "eqs(var1 var2 var3)" in the code?  I would like for someone to help me understand what I'm doing wrong in my modeling, so I can get these analyses to run.  Thank you!

Lisa

. gllamm overwt_notdep boy w1_yrs, i(scid) family(gaussian) link(oprobit) eform pweight(wt)

could not calculate numerical derivatives
flat or discontinuous region encountered
(error occurred in ML computation)
(use trace option and check correctness of initial model)
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