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st: sample selection model_Heckman


From   Irina Andrievskaya <abcdirina@yandex.ru>
To   statalist@hsphsun2.harvard.edu
Subject   st: sample selection model_Heckman
Date   Fri, 20 Jan 2012 09:39:19 +0100

Dear stata users,

I would like to ask you concerning the sample selection model. When I use Heckman in stata and specify the cluster option, stata does not report the Wald chi-square. How is it possible to examine the goodness of fit of the model then?

Thank you,
Irina
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