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st: treatment effects - two step


From   Elif Sisli <esisli@stern.nyu.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: treatment effects - two step
Date   Tue, 03 May 2005 12:02:12 -0400

Hello,

I am fitting a treatment effects model using treatreg... When I use the
two-step procedure, I have perfect correlation between the errors
(rho=1, or -1). How should I interpret this? It is worrisome.

Thanks.

Elif

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