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st: AW: RE: missing estimates


From   Daniel Muller <d.mueller@agr.uni-goettingen.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: RE: missing estimates
Date   Thu, 21 Nov 2002 15:35:24 +0100

in addition, if your model is not correctly specified, you
might obtain missing values in the variance-covariance
matrix. Then these standard errors cannot be calculated,
hence, se, p and cf are missing.

Daniel

-----Ursprungliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu]Im Auftrag von
Nick Cox
Gesendet: Donnerstag, 21. November 2002 15:17
An: statalist@hsphsun2.harvard.edu
Betreff: st: RE: missing estimates


Henrik Andersson
>
> probably a trivial question, but I will ask it anyway
since
> I do not find
> any answer in the "manuals". Sometimes when I run a
> regression the estmates
> for std. err., t-value, p-value, and conf.int. are missing
from the
> "output". They are only market by a dot. Why is that?

Here's one circumstance. If the estimate
of the standard error is 0, then by
an obvious sequence t, P and the limits
are all indeterminate. It's perhaps arguable
that in that circumstance the se should be
shown as 0, but either way the practical
message is the same.

Nick
n.j.cox@durham.ac.uk

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