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RE: st: computing confidence intervals of predicted values with postgr


From   "Halim, Nafisa" <[email protected]>
To   "[email protected]" <[email protected]>
Subject   RE: st: computing confidence intervals of predicted values with postgr
Date   Mon, 8 Nov 2010 22:17:09 -0500

Many thanks Maarten!
Nafisa


________________________________________
From: [email protected] [[email protected]] On Behalf Of Maarten buis [[email protected]]
Sent: Monday, November 08, 2010 1:03 PM
To: [email protected]
Subject: Re: st: computing confidence intervals of predicted values with postgr

--- On Mon, 8/11/10, Halim, Nafisa wrote:
> I want to compute predict values and their confidence
> intervals while letting the key explanatory variable and its
> quadratic term vary and holding the rest at their
> means.

I like the old -adjust- command for that, see -help adjust- and
the example below:

*-------------- begin example -------------
sysuse auto, clear
gen price2 = price^2
reg mpg price price2 foreign rep78

preserve
adjust rep78 foreign, by(price) ci replace
twoway rarea lb ub price, sort || ///
       line xb price, sort legend(off)
restore
*--------------- end example ---------------
(For more on examples I sent to the Statalist see:
http://www.maartenbuis.nl/example_faq )

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

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




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