[R] vif() from Design and car

[Rajarshi Guha]

Hi,
  I've been generating linear models with lm(). I wanted to look at the
VIF's for the coefficient. Using the vif() function from the package
Design, I would get unusually high VIF's.

However using vif() from the car package I get more reasonable values
(ie in line with the quality of the model).

What is the difference between the two vif functions? (I dont have
access to the reference in the Design's vif() help page)

Thanks,

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Rajarshi Guha <rxg218 at psu.edu> <http://jijo.cjb.net>
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