Is That Really You, Alan?

Unusual comments from the Fed chief have people asking, Will the real Greenspan please stand up?

Q. How many Federal Reserve chairmen does it take to change a light bulb?

A. One. Greenspan holds the bulb, and the rest of the world revolves around him.

That joke, making the rounds on Wall Street, is a not-too-subtle poke at Federal Reserve boss Alan Greenspan, who has recently offered some unusual--even heretical--views on why he'll continue to raise interest rates to slow things down.

The apostle of the new economy is now citing increasing productivity as a source of inflation. To many economists, it's like saying vitamin C causes colds. The chairman is also concerned that we're feeling a...

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