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RE: st: Differencing problem
From
Michael Betz <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: Differencing problem
Date
Wed, 26 Jun 2013 22:38:37 +0000
The code you sent works fine. I am using -xtset- to define the panel data. Will that make a difference?
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Sergiy Radyakin
Sent: Wednesday, June 26, 2013 4:41 PM
To: [email protected]
Subject: Re: st: Differencing problem
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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