Re: st: What is i. ?

[Michael Hanson <mshanson@mac.com>]

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

> Hi!
>
> 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
> me.
>
>
> 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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