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st: -xi: regress- fails
From
Jochen Späth <[email protected]>
To
<[email protected]>
Subject
st: -xi: regress- fails
Date
Wed, 3 Nov 2010 20:09:55 +0100
Dear statalisters,
I happen to have a mysterious problem with -xi- when trying to estimate a regression model with two dummy variables and interactions of various continuos variables and a dummy variable, i.e.
xi: regress y i.dummy1 i.dummy2 i.dummy3*x1 i.dummy3|x2 ... i.dummy3|x7
Stata tells me "variable __000003 not found" and breaks the execution of -xi: regress-. After -set trace on- I recognized this being a problem of the _ggroup subroutine but at this point I don't know what to do.
Should I simply rely on -tab z, gen(dummy)- and create all interaction terms manually? (however, for convenience, I would not prefer this workaround since I have many interaction terms.)
Maybe I should mention that I am running -xi: regress- several times before I get the error message above and everything works fine.
Many thanks,
Jochen
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