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st: re: how to express the mean of a variable in a calculation?


From   Kit Baum <baum@bc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: re: how to express the mean of a variable in a calculation?
Date   Tue, 7 Jul 2009 20:46:38 -0400

<>	
sysuse auto
g mpgwt = mpg*weight
reg price mpg weight mpgwt
su weight, mean
lincom mpg + `r(mean)' * mpgwt

If you want median or other percentiles, use

qui su weight, detail
lincom mpg + `r(p50)' * mpgwt


Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
   An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html



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