Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: st: Differencing problem
From
Michael Betz <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: Differencing problem
Date
Thu, 27 Jun 2013 01:56:16 +0000
. d college_
storage display value
variable name type format label variable label
------------------------------------------------------------------------------------------------------------------------------------
college_ float %9.0g
. su college_
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
college_ | 716 94970.41 257294.9 3479 3707827
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox
Sent: Wednesday, June 26, 2013 6:53 PM
To: [email protected]
Subject: Re: st: Differencing problem
I would bet No. Show us the results of
d var
su var
Nick
[email protected]
On 26 June 2013 23:38, Michael Betz <[email protected]> wrote:
> The code you sent works fine. I am using -xtset- to define the panel data. Will that make a difference?
Sergiy Radyakin
> 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:
>> 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.
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/