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st: Testing interaction terms when using factor variables


From   Richard Williams <richardwilliams.ndu@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Testing interaction terms when using factor variables
Date   Thu, 27 Oct 2011 16:32:41 -0500

I am looking for a shorthand notation when testing multiple interaction terms at once.

-----------
use "http://www.indiana.edu/~jslsoc/stata/spex_data/tenure01.dta";, clear

quietly logit tenure i.female year c.year#c.year select articles prestige i.female#(c.year c.year#c.year c.select c.articles c.prestige)

test 1.female#c.year 1.female#c.year#c.year 1.female#c.select 1.female#c.articles 1.female#c.prestige

test  1.female#(c.year c.year#c.year c.select c.articles c.prestige)
-----------

The first test command, where I spell out each interaction separately, works fine. But, with the second test command, I get

invalid varname
r(198);

You would think there would be some sort of shorthand way of doing this, but if so I can't figure out what it is.

-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME:   (574)289-5227
EMAIL:  Richard.A.Williams.5@ND.Edu
WWW:    http://www.nd.edu/~rwilliam

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