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st: xt unit-exclusive means by year
From
Jim Mahon <[email protected]>
To
[email protected]
Subject
st: xt unit-exclusive means by year
Date
Thu, 29 Jul 2010 13:48:26 -0400
Dear statalist,
I'm trying to create an instrument in cross-sectional time series that takes
an initial value for each unit and then applies to it the mean trend for all
units but the one in question, and then repeats this operation for each
unit. Sounds simple, but I can't figure out how to do it: "by country:
egen instrument = mean(varname) if id ~= x" obviously doesn't work. Interaction
expansion seems not to be the route. Do I have to program something? I'd
love not to have to create a new variable for each unit.
Thanks and best wishes,
Jim Mahon
--
James E. Mahon, Jr.
Woodrow Wilson Professor and Chair
Department of Political Science
Williams College
226 Schapiro Hall
24 Hopkins Hall Drive
Williamstown, MA 01267
(413) 597-2236
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