# st: RE: RE: re: if-sentences in Stata

 From Linn Renée Naper To Subject st: RE: RE: re: if-sentences in Stata Date Fri, 28 Nov 2008 00:40:24 +0100

```Thanks Kit, I think your command is going
to work.
At least its working when trying it out on a
Small test-sample. My actual sample has more
than 60 000 obs.

I have problems in generating a variable I need
In the calculations however:
I need to generate a variable X2 as a mean of
the variable X1 and the next x1[_n+1] til
X1[_n+8].
Can this be done using egen?
As this variable X2 will be changed it is not
very practical to calculate the mean by
typing X2=(X1 + X1[_n+1] etc..)/n

L

-----Opprinnelig melding-----
Fra: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] På vegne av Linn Renée Naper
Sendt: 27. november 2008 20:41
Til: statalist@hsphsun2.harvard.edu
Emne: st: RE: re: if-sentences in Stata

Thanks
I am looking into your proposed solution right now.
Linn

-----Opprinnelig melding-----
Fra: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] På vegne av Kit Baum
Sendt: 27. november 2008 20:34
Til: statalist@hsphsun2.harvard.edu
Emne: st: re: if-sentences in Stata

< >
Linn said

I've tried and it really doesn't matter...
I get the same result.

And that result will presumably be meaningless, as a statement like

if shift == 1

will ever only reference the FIRST observation of the variable shift.
Given what you have outlined as the logic, I cannot imagine that this
could be useful. Please see my proposed solution.

Kit Baum, Boston College Economics and DIW Berlin
http://ideas.repec.org/e/pba1.html
An Introduction to Modern Econometrics Using Stata:
http://www.stata-press.com/books/imeus.html

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```