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Re: st: IV command in system GMM

From   Nick Cox <>
Subject   Re: st: IV command in system GMM
Date   Mon, 6 Jun 2011 09:00:01 +0100

-ivregress- is part of official Stata; thus you need not and can not
install it from outside.

-ivreg2- is a user-written counterpart from SSC.

I don't know that there is any -iv- command. What makes you think there is one?

Comment on your error message is difficult as you don't show us the
code you used or tell us anything about your data.


On Mon, Jun 6, 2011 at 8:50 AM, lreine ycenna <> wrote:

> I'm trying out system GMM estimation where an error message popped up
> saying 'invalid iv'. I tried to install the command ivregress by using
> ssc install ivregress, but I got a ' ivregress is not found at ssc'.
> It seems that I will need to first install the IV command in Stata.
> How do I do that?
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