Re: st: Mlogit with constraints

[Richard Williams <Richard.A.Williams.5@ND.edu>]

At 01:12 PM 12/11/2005, narazani wrote:

> Dear all,
>
> I ran a multinomial logit with constraints and after that I used the command
> "predict" to get the predicted probabilities. Stata result was: same
> probabilities for 3 alternatives. Do you know any other command to predict the
> probabilities when mlogit with constraints is used?
Your results look quite peculiar.  You specify constraints 1-3 but 
mlogit reports 9 constraints.  The model has -1 degrees of 
freedom.  Most of the constants are getting dropped.

I suspect something is wrong with your model specification.  We need 
to see more.  Include the actual constraints commands you are 
using.  I don't think the problem is with the predict command (which 
seems to be working correctly given the parameter estimates) but with 
the model itself.

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Richard Williams, Notre Dame Dept of Sociology
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