A Funny Story

Q: How many economists does it take to screw in a light bulb?
A: None. If the light bulb really needed changing, market forces would have already caused it to happen.
A: Two. One to assume the ladder and one to change the bulb.
A: Two. One to assume the latter (a pun) and change the bulb.
A: None. If the government would just leave it alone, it would screw itself in.