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Re: st: Problem creating lag variable in panel data


From   Fernando Rios Avila <f.rios.a@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Problem creating lag variable in panel data
Date   Tue, 17 Dec 2013 14:09:50 -0500

Hi Michael,
That is a miss understanding.
The right way to get the 1 year lag is:
gen lroi=l.roi
(lower case L)
what you are doing is a handy way to create dummies.
HTH
Fernando

On Tue, Dec 17, 2013 at 2:02 PM, Michael Riechert
<Michael.Riechert@the-klu.org> wrote:
> Dear all,
>
> I still facing problem while creating a lag variable within my panel data. I have
> multiple cross sectional units (companies) and years. I used xtset to define
> panel structure and then  gen roi1=1.roi to create a 1-year lag variable
> of the original variable roi. But the new variable only contains zeros. The
> same is true for other variables. I am sure I did something wrong but have no
> clue so far what it is. I appreciate every hint you will give me. Thank you!
>
> Best regards,
> Michael
>
>
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