A day after investors griped and moaned about a smaller-than-desired cut in interest rates, Federal Reserve Chairman Alan Greenspan wasn't talking — at least not about the economy.

In a guest lecture Wednesday to former Vice President Al Gore's journalism class at Columbia University, Greenspan stuck to his planned topic of "the economy and the media."

He advised students to remember integrity and caution in an era of around-the-clock reporting, noting that "a journalist's market value is his or her reputation," class members said afterward.

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Reporters and tape recorders were barred from the classroom under university rules.

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