The Stanford academics used the first of those ideas - what's called a Linear No-Threshold (LNT) model.

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The capital asset pricing model (CAPM) approximates return as a linear function of beta.

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Important cases where the computational definition of R2 can yield negative values, depending on the definition used, arise where the predictions which are being compared to the corresponding outcomes have not been derived from a model-fitting procedure using those data, and where linear regression is conducted without including an intercept.

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Unfortunately, the predominant model to-date has been to attach the interactivity to linear TV spots, thus somewhat undervaluing the viewers evolving behaviors and the ability to reach that viewer in a lot more places throughout their TV viewing experience.

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Ultimately we believe that DVRs are going to eventually invalidate non-live linear TV as we know it -- and broadcast TV and its affiliate model along with it.

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