Panel Data

[Denis Beuca]

Hi,

I am using panel data with the wave variable ranging from 1 to 10 however i would like to focus on wave 1 to 8 instead when testing for POLS how would I be able to do this ?

I would appreciate any help

Kind regards,

Denis

[Clyde Schechter]

-keep if wave <= 8-

By the way, I'm not familiar with the acronym/initialism POLS? The OLS part suggests it has something to do with least squares regression, but can you please spell it out?

[Denis Beuca]

It stands for Pooled OLS

[Clyde Schechter]

Oh, of course! Thanks.

[Denis Beuca]

Thanks a lot

[Carlo Lazzaro]

Denis:
you can also include an -if- clause and keep your original dataset unchanged.
Assuming that you are interested in the -re- specification, you can code something along the following lines:

xtreg <yourdepvar> <yourindepvar> if wave<=8

In addition you can test the correctness of -xtreg,re- for your data via the community-contributed module -xtoverid-.