Sometimes R 2 > r 2 yx 1 + r 2 yx 2 : Correlated Variables Are Not Always Redundant

David Hamilton, Sometimes R2 > r2 yx1 + r2 yx2 : Correlated Variables Are Not Always Redundant, The American Statistician, Vol. 41, No. 2 (May, 1987), pp. 129-132