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Re: st: -finddup- for panel?


From   "joe J." <otharain@hotmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: -finddup- for panel?
Date   Wed, 21 Apr 2004 06:19:16 +0000

Hello Fred,

Many thanks for your suggestion. I did not know that -finddup- could be used for panel data.

Joe.


From: Fred Wolfe <fwolfe@arthritis-research.org>
Reply-To: statalist@hsphsun2.harvard.edu
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: -finddup- for panel?
Date: Tue, 20 Apr 2004 12:05:20 -0500

Unless I misunderstand the problem, -finddup- can identify the duplicate and they can be excluded from the interpolation by an if statement
: finddup id panel, keep

Fred Wolfe


At 11:22 AM 4/20/2004, you wrote:

Hello,

I have a panel data set, where there are duplicates of the panel variable. But I want to retain them because the mistake is only in the panel variable, not in other variables in the observation. (For my analysis, I would aggregate the data so that the panel variable is no longer relevant.)

BUT, I keep the panel format in the beginning in order to fill in missing values using interpolation. To do this I want to keep out observations with the duplicate panel variable and append them back after interpolation has been done. For a non-panel data, I could use the stata-code -FINDDUP- (by Fred Wolfe downloadable from SSC). -finddup- helps to take out a particular duplicate observation and save it for later use. But it does not work in a panel set up. Is there any way around, other than doing it sepeartely for each year?
Joe

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Fred Wolfe
National Data Bank for Rheumatic Diseases
Wichita, Kansas
Tel (316) 263-2125     Fax (316) 263-0761
fwolfe@arthritis-research.org


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