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st: re: Question about "predict" and "mean" when i ~= (not equal) j?


From   Christopher Baum <baum@bc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: re: Question about "predict" and "mean" when i ~= (not equal) j?
Date   Tue, 24 Nov 2009 17:22:37 -0500

<>
webuse grunfeld,clear
egen sumrest = total(time), by(company)
egen n = count(time), by(company)
g meanrest = (sumrest - time) / (n - 1)

meanrest is the average of the values not including the current value for each company. Replace 'time' with 'invest' to get something more meaningful (so to speak).

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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