Anti-trust lawyers have built careers around placing roadblocks in front of companies they deem too powerful, but the baseball-card industry reveals how difficult it is to predict the future of anything.

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"It's really difficult to predict what the future is going to bring, " says Gary Zenkel, senior VP of marketing and business development for NBC's Olympics coverage.

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At these levels it is difficult to predict future inflation rates with any accuracy, so setting targets might actually damage the central bank's credibility.

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