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Re: st: xttobit & stata 12: Initial values not feasible


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: xttobit & stata 12: Initial values not feasible
Date   Wed, 4 Jul 2012 08:48:24 +0200

On Wed, Jul 4, 2012 at 8:39 AM, Surender Komera wrote:
> I centered the explanatory
> variables (egen new_var =  old_var - mean(old_var)) and run the
> 'xttobit'. The problem is same, it is still throwing out with the same
> error message "Initial values not feasible".

Than it is time to simplify your model. Start without any explanatory
variables, and see if the model converges. Than, add covariates one by
one till you run into problems. That way you can at least identifiy
the source of the problem.

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany


http://www.maartenbuis.nl
--------------------------
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