I share Mark's view - the ability to handle unbalanced panels has
always been extremely important in my work.
Joana
On 25/08/05, Mark Schaffer <[email protected]> wrote:
> This sounds really useful. I would vote for "long" and the ability to
> handle unbalanced panels. I can't remember the last time I had a balanced
> panel to work with.
>
> --Mark
>
> > Fellow listers,
> >
> > I am writing a procedure for Pooled Mean Group estimation for
> > heterogeneous panels (a la Pesaran, Smith, and Shin). I have all the
> > estimation figured out, but I would like some input regarding user
> > preferences of model setup.
> >
> > Basically, I am interested to know if potential users of such a procedure
> > prefer "long" or "wide" data format for this type of estimation.
> >
> > The give and take:
> >
> > Option 1: "Long" data: the procedure would seem much more like Stata's
> > other xt estimation commands. More importantly, unbalanced panels can be
> > easily handled. However, cross equation restrictions will be unavailable
> > to the user.
> >
> > Option 2: "Wide" data: it will be trivial to allow users to impose cross
> > equation (that is, cross panel) restrictions of parameter estimates.
> > However, unbalanced panels will not be allowed.
> >
> > Please note that with either option the user will be able to perform
> > cross-equation tests -- but only with Option 2 will the a priori
> > restrictions be easily handled.
> >
> > My underlying question is which is more valuable to users: the ability to
> > handle unbalanced panels or (in the context of these heterogeneous models)
> > allow for cross-panel restrictions?
> >
> > I have my preference, but I would be interested to hear from any
> > enlightened and opinionated users!
> >
> > Edward F. Blackburne III, PhD
> > Associate Professor
> > Economics and International Business
> > Sam Houston State University
> > [email protected]
> > 936-294-3934
> > *
> > * For searches and help try:
> > * http://www.stata.com/support/faqs/res/findit.html
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
> >
>
>
> Prof. Mark Schaffer
> Director, CERT
> Department of Economics
> School of Management & Languages
> Heriot-Watt University, Edinburgh EH14 4AS
> tel +44-131-451-3494 / fax +44-131-451-3294
> email: [email protected]
> web: http://www.sml.hw.ac.uk/ecomes
>
>
>
> __________________________________________________________________
>
> DISCLAIMER:
>
> This e-mail message is subject to http://www.hw.ac.uk/disclaim.htm
> __________________________________________________________________
>
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
