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st: 3-way interactions & xi3

From   "Danielle H. Ferry" <>
Subject   st: 3-way interactions & xi3
Date   Tue, 30 Mar 2004 13:49:08 -0500


I am trying to use <xi3> to run a regression w/ a 3-way interaction. This works fine unless as long as I have con*con*con. As soon as introduce a categorical variable into the interaction, however, I get the error "varlist not allowed". An example of a reg where I run into this problem is:

xi3: reg brthLn i.state*i.ageCat*popnLn

Any help would be greatly appreciated. Thanks.

Danielle Ferry
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