Re: st: Re: Moving Average

[Ernest Berkhout <ernestb@seo.fee.uva.nl>]

At 23:26 9-5-2003, you wrote:
> > Is there a way to force Stata to calculate a moving average using an EVEN
> number?  I am trying to calculate ma() over several years, and a 12 month
> moving ave. makes the most sense.
I had the same kind of problem, and I tackled that with a simple "generate" 
and explicit subscripting.
Essential is it that the data are in long format, and that you sort on the 
timevariable first.

bysort (QUARTER): gen zkd_smooth4 = ( PLOTVAR[_n] +  PLOTVAR[_n-1] 
+  PLOTVAR[_n-2] +  PLOTVAR[_n-3] )/4


Ernest Berkhout
Stichting voor Economisch Onderzoek
Universiteit van Amsterdam

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