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

[Maarten buis <maartenbuis@yahoo.co.uk>]

--- 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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