Provenge was once widely expected to be a blockbuster, but demand has never panned out.

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The outcome of the subsequent investigation was never revealed but now there is a growing demand that such information is shared with the public.

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But using a tax to reduce gasoline demand has never proven politically feasible in the United States.

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This is problematic because not only does sound policy demand accurate theory, but he will never win over nay sayers if his argument is fundamentally the same as theirs.

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The truth is, Keynes attacked but never refuted Say's Law: Supply creates its own demand.

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"We never intended to set up a business, but we weren't going to deny the demand for it, " she says.

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