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st: whether difference is significant


From   "Lynn Lee" <lynn09v@gmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: whether difference is significant
Date   Mon, 15 Oct 2012 20:42:55 +0800

Thank Maarten and Rich.

Best Regards,
Lynn Lee


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Maarten Buis
Sent: Monday, October 15, 2012 8:25 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: whether difference is significant

On Mon, Oct 15, 2012 at 2:13 PM, Lynn Lee wrote:
> I forgot to mention one point in my previous email. If I want to test 
> the difference in two coefficients, I can do F test. But I do not know 
> how to do it in Stata11. I want to test for several groups of 
> coefficients. So, I need several independent reports of F-test.

-help test-, but remember that an interaction effect in its default form is
itself already the difference between two coefficients, so you'll probably
not need to use it. See: M.L. Buis (2012) "Stata tip
106: With or without reference", The Stata Journal, 12(1), pp.
162-164.

-- Maarten

---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany

http://www.maartenbuis.nl
---------------------------------
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