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st: Thread-Index: Acxt/JotuWfl6q77Q3eNcmx90khT0Q==


From   YUNHEE CHANG <chang@olemiss.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Thread-Index: Acxt/JotuWfl6q77Q3eNcmx90khT0Q==
Date   Thu, 8 Sep 2011 07:54:57 +0000

Dear Statalist:


I am estimating two differently-specified IV regressions and trying to compare coefficients between the two models. I tried:


ivregress 2sls y x1 x2 (x1=z)
est store reg1


ivregress 2sls y x1 x2 x3 (x1=z)
est store reg2


test [reg1]_b[x1]=[reg2]_b[x1]


Then I get "equation [reg1] not found" error. What am I doing wrong?


Thanks.
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