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st: AW: calculation within a panel


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: calculation within a panel
Date   Wed, 3 Feb 2010 15:15:07 +0100

<> 



*************
clear*

input byte( school_code  )    year   sch_lunch 
1  2000   1200      
2  2000   300     
1  2001   1300      
2  2001   500     
end

compress

bys school_code (year): gen growth=sch_lunch[_n]/sch_lunch[_n-1]-1
list, noo
*************



HTH
Martin

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Rodrigo Briceño
Gesendet: Mittwoch, 3. Februar 2010 15:10
An: statalist@hsphsun2.harvard.edu
Betreff: st: calculation within a panel

Dear Stata Users. I have a stata file with several variables for 500
schools in years 2000-2009.
One of this variables is the monetary allocation each school received
for school lunch program.
What I need is to estimate the growth rate of the allocation received
each period, but I have no
idea how to do that.

I'm using Stata 10 and windows XP.

Example:

school_code      year   sch_lunch  growth
1                      2000    1200          na
2                      2000      300          na
1                      2001    1300          0.083
2                      2001      500          0.666, etc.

thanks for your help
--
Rodrigo Briceño
Economist
+506  22-91-12-00 ext. 113   Office
+506  22-32-08-30                Fax
rjbriceno@gmail.com

MSN: jbric98@hotmail.com
SKYPE: rbriceno1087

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