Re: st: RE: Error message with GMM command

[Nick Cox <njcoxstata@gmail.com>]

Means no numerical observations to do that with. You need to look at  
your dataset to see where the problem is.

Nick

On 6 Jun 2011, at 13:27, lreine ycenna <lreine.ycenna@gmail.com> wrote:

> No observations.
> r(2000);
>
> using 'xtabond2 y L.y a b c axb axc, gmm (y b c) iv (a) two robust  
> small'
>
> :S
>
>
>
> On 6 June 2011 13:08, lreine ycenna <lreine.ycenna@gmail.com> wrote:
> > I've just done the update.
> >
> > I dont understand why 3 other error messages appear after the GMM  
> > command:
> >
> > xtabond2 y a b c axb axc, gmm (y b c, eq(diff)) iv (a, eq(level)) two
> > robust small
> >
> > estimates post: matrix has missing values
> >                 stata():  3598  Stata returned error
> >         xtabond2_mata():     -  function returned error
> >                 <istmt>:     -  function returned error
> > r(3598);
> >
> > xtabond2 y a b c axb axc, gmm (y b c, eq(diff)) iv (a, eq(level)) two
> > robust small
> >
> > It syas that matrix has missing values?
> > I'm using longitude panel data, so I wonder if there's anything on  
> > the
> > format of my data I need to set up first that I
> >
> >
> >
> > >
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