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Re: st: predict y | y not observed after heckman


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: predict y | y not observed after heckman
Date   Tue, 1 Feb 2011 11:02:43 +0000 (GMT)

--- On Tue, 1/2/11, Florian Wakolbinger wrote:
> I found "predict, ycond", which produces the prediction
> conditional on y being observed. However, there seems
> to be no command for a prediction conditional on y being
> NOT observed.
> 
> Is it necessary to calculate this "by hand", or is there an
> alternative command that does this?

In that case it depends on what you exactly want. Either you
want the real outcome, in which case it is all 0 (or whatever
other cutoff value you choose). Or you want the latent outcome,
in which case it is just the linear predictor (option xb).

Hope this helps,
Maarten

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

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


      

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