Talk:Interaction variable

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hi, sorry, if my example is biased towards my experience... if it doesnt make sense or someone thinks they can simplify it further please do :) Tmov81 02:27, 12 December 2006 (UTC)[reply]

Interaction and multicollinearity

Including interaction variables doesn't cause problems with multicollinearity (except maybe in some rare and not very noteworthy cases). If you have two variables in a regression model and you multiply them together and use the product as a third variable, the third variable can not be collinear with the other variables because it is their product.--Bkwillwm 23:05, 29 August 2007 (UTC)[reply]