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st: identifying obs actually used in a Logit model


From   "Jiang, Frank" <[email protected]>
To   <[email protected]>
Subject   st: identifying obs actually used in a Logit model
Date   Thu, 23 Apr 2009 07:17:09 -0400

Dear listers,

I am having difficulty identifying observations used in a logit model.
The model includes several sets of dummy variables.  Some observations
were automatically dropped because some dummy variables perfectly
predict failures, i.e. DV==0.  As a result, the number of obs used by
the logit model is smaller than the number of obs in the dataset.
However, I don't know which obs were excluded.  Is there a way to
identify the obs that were actually used in the model?

Thanks
Frank
 


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