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

st: interaction models in stata


From   "Elizabeth Whiting" <Elizabeth.Whiting@ons.gsi.gov.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: interaction models in stata
Date   Sat, 11 Jun 2005 08:52:38 +0100

Hi

I am running a logistic model with lots of 2 and 3 way interactions in it.
In the output STATA produces a list all of the variables which it says have
been dropped due to multicollinearity (which is basically all of them), but
it then goes on to produce the model with parameter estimates for all of
the variables that it says it has dropped. Does anyone know what this
means? Can I interpret the model the same as you normally would?

In addition when you run the same thing in gllamm with a second level
specified it again lists all the variables, which have been dropped due to
multi-collinearity, but in this case it says it can't run the model and it
then stops without producing any estimates. Does anyone know how you get
around this problem? Why will it run in logit regression but not in gllamm?

Thanks for your help

Liz




For the latest data on the economy and society 
consult National Statistics at http://www.statistics.gov.uk

**********************************************************************
Please Note:  Incoming and outgoing email messages
are routinely monitored for compliance with our policy
on the use of electronic communications
**********************************************************************
Legal Disclaimer  :  Any views expressed by
the sender of this message are not necessarily
those of the Office for National Statistics
**********************************************************************

The original of this email was scanned for viruses by the Government Secure Intranet (GSi) virus scanning service supplied exclusively by Energis in partnership with MessageLabs.

On leaving the GSi this email was certified virus-free

*
*   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/



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