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re: st: panel data


From   Buzz Burhans <wsb2@cornell.edu>
To   statalist@hsphsun2.harvard.edu
Subject   re: st: panel data
Date   Fri, 20 Feb 2004 11:12:23 -0500

A thought for Stata Corp:

Judging by the frequency a similar question is asked, and having been there myself, Devendra's question is a very common one when one first begins working with panel data in Stata. It would be a useful, and probably also a worthwhile investment of resources if the introduction section of the "Cross Sectional Time Series" volume of the Stata manual was expanded to include a discussion of management of time series data, with some examples. In addition, some of the common questions about examining various issues related to ts data would benefit from a greater exposition there..for instance, examining panel level heteroskedasticity, or within panel autocorrelation of errors. These are common issues, they come up frequently on the list, and I would guess that they consume a fair amount of tech support time as well.

Additionally, perhaps an exposition of such points would be worth considering for a NASUG presentation, or an SJ article.

Just a thought about a seemingly common area of questions

Buzz Burhans


At 09:24 AM 2/20/2004 -0500, you wrote:

Hi,
I have a longitudinal (panel) data set with variables that are constant over
time (e.g. gender). Some of the entries for an individual are missing
(actually not entered) and I wish to fill in these missing entries.

ID        Gender        Year
1            M                1991
1            .                  1992
1            .                  1993
1            M                1994
2            .                   1988
2            F                 1989
2            .                   1990
2            .                   1991

Can you suggest a way to fill in these missing entries?
Many thanks in advance.

Devendra Amre MBBS., Ph.D.


Buzz Burhans
wsb2@cornell.edu


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