How do I calculate residual income and economic value added, no matter I how I read I don't seem to be comprehending what I am reading. Can someone simplify it for me?

An Excellent Article:- SEE:-

Residual Income Valuation
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... concept of residual income, on the other... What is it's residual income?. Residual income has also been called economic profit since it represents the... faculty.etsu.edu/trainor/FNCE 4617/AE5.ppt