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st: how to create more than 2-way interaction terms in xi: regressions?


From   Dan Waldo <dwaldo@aresearch.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: how to create more than 2-way interaction terms in xi: regressions?
Date   Fri, 26 Dec 2008 12:01:35 -0500

Dear all,

I see that one can create interaction terms in regressions by typing, for example,
xi: regress income i.age*i.sex

suppose that I wish to interact age and sex with race, though ... Stata appears to reject
xi: regress income i.age*i.sex*i.race

Is there a way to do this without creating 3 2-way interaction terms? Or without creating a separate variable that distinguishes people by age, sex, and race?

Thanks!
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