She answered that she did, and led the man to the reference shelves where the economics and economy books were.

To the surprise of both the librarian and the man all of the books were off the shelf being used.

"That's OK," the man said. "I'll just go to another library. You see, I'm a very busy man, and I set this weekend aside for studying economics and the economy."

The librarian said she understood and gave the man directions to the nearest research library. But her interest piqued, she asked: "Why are you so urgent to study economics and the economy?"

The man replied: "I'm an economist. I've been teaching at this university for the past ten years. I'm attending a business meeting on Monday, and I figure the economy has changed in the past ten years."