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Re: st: multicollinearity

From   SR Millis <>
Subject   Re: st: multicollinearity
Date   Thu, 20 Nov 2008 17:07:47 -0800 (PST)

VIF alone is not sufficient to evaluate the degree and source of collinearity.  You also need to examine the condition indexes and the variance decomposition proportions.

SR Millis

--- On Thu, 11/20/08, Chris Witte <> wrote:

> From: Chris Witte <>
> Subject: Re: st: multicollinearity
> To:
> Date: Thursday, November 20, 2008, 4:00 PM
> Thanks for the advice Jay.
> Regarding the listserv:  I remembered not being able to
> post in the past because I was trying to send rich text and
> I thought that maybe sending a link was unacceptable as
> well.  I usually stay pretty calm when I don't
> instantly see my question posted.
> Regarding variance inflation factors:  I just tried out
> the -collin- function for fun.  Is there a generally
> accepted VIF value that should raise a red flag?... Or is
> this something that people argue about too?  I seem to
> recall that VIF's above 10 are supposed to be bad,
> right? 

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