Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: HELP! xtgls and heteroskedasticity test

From   paula garcia <>
Subject   st: HELP! xtgls and heteroskedasticity test
Date   Wed, 25 Sep 2002 13:14:58 -0400

Dear statalist!

I know how to do an heteroskedasticity test with the command xtgls. I read it on the FAQ questions. You only have to do a test using the maximum likelihood estimators. Therefore, you first need  to do an iterated gls regression.

The problem is that with my data, the iteration is never achieved, stata goes and goes iterating.

1) Is that a problem of my data? (I only have 79 subjects and 7 years) Do I have a very little dataset?

2) How can then I perform a heteroskedasticity test without the igls option?

Thank you in advance for all your help!

_________________________________________________________  Gratuito, latino y en espaņol.

*   For searches and help try:

© Copyright 1996–2017 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index