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st: Interaction tests between categorical variables
From
Amal Khanolkar <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: Interaction tests between categorical variables
Date
Tue, 14 Aug 2012 09:36:09 +0000
Hello all,
I'm trying to run the following model with an interaction term between two categorical variables; motherland and education. However I get an error message when I change the baseline group of the second categorical variable, education. How do I go about avoiding the problem? (the interaction model runs if I just run it without changing the baseline group of Education).
. xi: regress bviktbs i.motherland*ib2.education sex byear ib3.magecat i.parity i.famsit_new ib5.gestwk_cat6 i.smoke1 i.gestht1 i.gestht2 i.gestht3 i.gestht4 i.gestdt i.MB
> MI2 mlangd ib6.immigyr_cat if multibirth==1
factor variables and time-series operators not allowed
Thanks & regards,
Amal Khanolkar
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