What is the difference between perfect and imperfect mutlicolinearity?

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What is the difference between perfect and imperfect mutlicolinearity?

In: Mathematics

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Anonymous 0 Comments

Your identical twin is perfectly collinear with you. Your other siblings are all imperfectly collinear with you.

I can predict a lot about what you look like by looking at your siblings. But I can predict exactly what you look like by looking at your identical twin.