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Re: st: Differencing problem


From   Sergiy Radyakin <[email protected]>
To   "[email protected]" <[email protected]>
Subject   Re: st: Differencing problem
Date   Wed, 26 Jun 2013 16:40:46 -0400

See if this works. The problem may be with the time variable. Sergiy

sysuse auto,clear
generate t=_n
tsset t
generate x=d.mpg
list mpg x


On Wed, Jun 26, 2013 at 4:20 PM, Michael Betz
<[email protected]> wrote:
> Hi,
>
> I am trying to use the "d." operator to get differenced observations but am having some trouble. When I try to calculate differenced observations using
>
> gen newvar=d.(var)
>
> Stata returns each observation as missing. My data has observations for each variable in each of two time periods and variation exists over the two time periods. I've used the "d." before without problems so I'm not sure what I'm missing here. Any help is appreciated.
>
> Mike
>
>
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