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st: HecKman two step procedure and prediction


From   Alfredo Ariza Alfaro <aarialf@upo.es>
To   statalist@hsphsun2.harvard.edu
Subject   st: HecKman two step procedure and prediction
Date   Thu, 30 Jun 2005 15:31:15 +0200

Hi everyone!
                   I want to predict  wages for women who do not work,
so I am using the Heckman two step procedure to calculate wages for
participants accounting for selection. To predict wages for non
participants accurately I want to use the standard error of the
prediction instead of using just the mean. Using "predict  var , stdp"
predicts the standard error of the prediction taking into account the
Mills ratio? Or is just calculating the standard error of the linear
regression without taking into account the selection?
Does "predict stdf" does this?
Thank you very much.

Regards.

--
Alfredo Ariza Alfaro
Departamento Economía y Empresa
Universidad Pablo de Olavide
Carretera Utrera, km.1
Edificio 3, planta 4, despacho 2
41013 SEVILLA, Spain
telf. + 34 954 34 9187
Fax.  + 34 954 34 9339
http://webdee.upo.es/aarialf

e-mail:aarialf@upo.es

"I disapprove of what you say, but I will
defend to the death your right to say it."
(The Friends of Voltaire, 1906)



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