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st: equality of coefficients after ivreg


From   <M.Xu1@lse.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: equality of coefficients after ivreg
Date   Wed, 9 Nov 2011 10:35:46 -0000

Dear list

I'm running 

Ivreg a_public b c (x = y z)
Eststo public
Ivreg a_private b c (x=y z)
Eststo private

Where a_public is 0 for a subsample "private" and a_private is 0 for a
subsample "public".

How can I test whether the coefficients of b are equal? It seems that
suest does not work with either ivreg nor reg3.

Thank you in advance
Moqi


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