Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: Balanced, unbalanced and weakly balanced definition


From   Glenn Landers <landers.glenn@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Balanced, unbalanced and weakly balanced definition
Date   Tue, 4 Sep 2012 08:06:20 -0400

Technical note

The terms balanced and unbalanced are often used to describe whether a
panel dataset is missing
some observations. If a dataset does not contain a time variable, then
panels are considered balanced
if each panel contains the same number of observations; otherwise, the
panels are unbalanced.

When the dataset contains a time variable, panels are said to be
strongly balanced if each panel
contains the same time points, weakly balanced if each panel contains
the same number of observations
but not the same time points, and unbalanced otherwise.

On Mon, Sep 3, 2012 at 9:38 AM,  <Caterina.ASTARITA@ext.ec.europa.eu> wrote:
> Dear Statalisters,
>
> I would like to know which is the criterion with which Stata defines unbalanced, weakly balanced and balanced panel data after launching the command xtset id year.
>
>
> Thanks a lot
>
> Caterina
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/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/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index