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Re: st: What is i. ?

From   Michael Hanson <>
Subject   Re: st: What is i. ?
Date   Sun, 13 Jul 2008 08:46:03 -0400

On Jul 10, 2008, at 3:36 PM, Solorzano, Jenniffer wrote:


Somebody knows what does it mean "i.variable name"? What does it mean i.
before the name of a variable?. I'm trying to run a instrumental
variable regression and I'm trying to understand a do-file somebody gave

This is the do-file part:

xi: ivreg lagreg3pcpc (lypc = lmiem e0_4 e5_8 e9_12 e13_17 e18_24 e25_54
e55_99 ultimoaprjef edadjefe i.region) ultimoaprjef edadjefe if PPA05==1
Do you know what the -xi:- prefix command does? Your question suggests not, and -help xi- is the appropriate action here. In it you will find a complete description of the i. notation, which will be important for understanding and interpreting the regression you are trying to estimate.

-- Mike

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