Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: -xi: regress- fails

From   Jochen Späth <>
To   <>
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,

*   For searches and help try:

© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index