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st: Re: st: Re: st: Clogit does not converge (Stata returns “not concave” for every iteration) – possible dummy variable problem in a DCE


From   "JVerkuilen (Gmail)" <jvverkuilen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: st: Re: st: Clogit does not converge (Stata returns “not concave” for every iteration) – possible dummy variable problem in a DCE
Date   Thu, 21 Mar 2013 19:44:22 -0400

On Thu, Mar 21, 2013 at 7:39 PM, Richard Williams
<richardwilliams.ndu@gmail.com> wrote:
> I've never run a model like this, but isn't ten subjects a little on
> the skimpy side.?

Yes, and it sounds unidentified if the addition of a variable makes
the whole model blow up.
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