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re: st: summarizing by more than one grouping variable


From   Christopher Baum <kit.baum@bc.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   re: st: summarizing by more than one grouping variable
Date   Tue, 27 Mar 2012 16:18:51 -0400

<>
by: takes a varlist, so you can get summaries by any set of groups you want (including more than two):

bys rep78 foreign: su price, d

However a slightly nicer display can be produced (for any number of by-variables) using egen and tabstat:

egen gp=group(rep78 foreign), label
tabstat price,by(gp)

Kit Baum   |   Boston College Economics and 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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