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Re: st: Missing Wald Chi2 value

From   "Clive Nicholas" <>
Subject   Re: st: Missing Wald Chi2 value
Date   Wed, 30 Jun 2004 18:31:32 +0100 (BST)

Siddhesh Kamat wrote:

> I am running a logistic model with 8 categorical independent variables.
> The sample size is 516 patients.
> The model has a non-significant Pearson's chi2 and 3 variables are
> significant at the 0.05 alpha level.
> The Wald chi2 indicates a missing value and the STATA message reads "
> Your estimation results show a F or chi2 model statistic reported to be
> missing.  Stata has done that so as not to be    misleading, not because
> there is something necessarily wrong with your model."
> Has any one come across this situation before?
> I would appreciate any input.

This came up a week or two ago. Look at -whelp j_robustsingular- for more
detail on why this happens.

CLIVE NICHOLAS        |t: 0(044)191 222 5969
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