Re: st: problem with bsample

[Maarten buis <maartenbuis@yahoo.co.uk>]

--- On Thu, 15/4/10, Woolton Lee wrote:
> One thing I forgot to mention is that we are running these
> models on 16 different datasets of the 16 there are only two for
> which this problem occurred.  I have examined these 2 datasets
> but have not been able to note substantive differences between
> these and the other 14 datasets.  I'm quite certain that there
> are no missing values in the treatment group indicator variable 
> (only 1s and 0s).

How did you determine that no there were no people in the
treatment group? I suspect that that is the key issue, 
as that could lead to an influence of missing values in
_other_ variables.

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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