The market won't reach equilibrium until housing prices bottom and the financial sector shows signs of recovery.

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Those who worked with what was alive in an infinity of yesterdays complained that even though they had no good explanation of why punctuated-equilibrium theory worked, you couldn't argue with the evidence in the rocks, maths or no maths.

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The '60s also probably wouldn't have been the best time for Ms. Arbus to find her equilibrium.

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