Re: st: Re: Running a foreach loop over a sequence of dates

["Brian P. Poi" <bpoi@stata.com>]

> ----- Original Message ----- From: "Augusto Cadenas"
> <aug.cadenas@googlemail.com>
> To: <statalist@hsphsun2.harvard.edu>
> Sent: Wednesday, December 03, 2008 10:02 PM
> Subject: st: Running a foreach loop over a sequence of dates
>
> Hello,
>
> I am trying to run a series of commands in a time series setting, and
> interested in using variable time intervals (variable time  windows, or
> variable start/end dates). So ideally, I would like to loop with
> -foreach- over a series of dates, but I cannot find the way of doing
> this. To give you an idea of the kind of problem, here it is in
> pseudo-code (not working):
>
> *** begin pseudo-code
>
> foreach t in 1992q1/2000q4 {
>      reg y L.y L.x if tin(1960q1, `t')
>      reg y L.y L.x if tin(`=`t'-20', `t')
> }

 How about this:

   forvalues t = `=q(1992q1)'/`=q(2000q4)' {
      reg y L.y L.x if date >= q(1960q1) & date <= `t'
      reg y L.y L.x if date >= `t'-20 & date <= `t'
   }


 where date is your quarterly date variable.

   -- Brian Poi
   -- bpoi@stata.com

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