"In every other field of science data is worth more than theory, " he says.

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It is a fine theory that would seem worth putting to the electoral test.

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Basic economic theory tells us that a company should be worth the net discounted value of the dividends that will be received from it.

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The owners value shares at less than the proportional value of underlying assets on the theory that fractional interests in a portfolio are not worth as much to outsiders.

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In the real world, as opposed to in theory, movable currencies are more trouble than they are worth.

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Authors Guofo Zhou and Yingzi Zu use some complex math based on the random-walk theory to show that the odds of watching half your liquid net worth evaporate are roughly similar to those of another major life event: death.

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