Best econ story evah

Someone who wishes to remain anonymous writes:

Here’s a joke we used to tell about someone in econ grad school, a few decades ago.

Two economists were walking down the street. The first one says: “Isn’t that a $20 bill?” The second one says: “Can’t be. If it were, somebody would have picked it up already.” They walk a little farther, and the second economist says: “Isn’t that a pile of dogshit?” The first one says: “Can’t be. If it were, ** would have published it already.”

No, this is not about anyone we’ve ever blogged about. It’s just a great story.