One day a man walked into the main library of a major research university. He stopped at the reference desk and asked the librarian if she had any current books about economics and the economy.

A party of economists was climbing in the Alps . After several hours they became hopelessly lost. One of them studied the map for some time, turning it up and down, sighting on distant landmarks, consulting his compass, and finally the sun.

A mathematician, a theoretical economist and an econometrician are asked to find a black cat (who doesn't really exist) in a closed room with the lights off:

One day a woman went for a walk in her neighborhood and came across a boy with some puppies. "Would you like a puppy? They aren't ready for new homes quite yet, but they will be in a few weeks!"

"Oh, they're adorable," the lady said. "What kind of dogs are they?"