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Re: st: nlsur error cannot have fewer observations than parameters


From   Austin Nichols <austinnichols@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: nlsur error cannot have fewer observations than parameters
Date   Fri, 5 Feb 2010 15:35:38 -0500

Nelson, Carl <chnelson@illinois.edu>:
"Please do not post homework questions, and please ignore any that are posted."
http://www.stata.com/support/faqs/res/statalist.html#question

On Fri, Feb 5, 2010 at 3:27 PM, Nelson, Carl <chnelson@illinois.edu> wrote:
> I would never choose such a specification for research. I am working on this for a problem set for a PhD class using the JAE data archive. Coelli reports that estimation of the model with convexity imposed was accomplished by maximum likelihood estimation of the system in Shazam. I don's want to make to big a point of it, but the results that I am seeing causes me to think that the parameter estimates are very fragile.
>
> I'm hoping someone can give me more insight into the cannot have fewer observations than parameters
> r(2001); error. Thanks.
>
> Carl Nelson

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