How many Conservative economists -- does it take to change a light bulb?

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• How many Conservative economists -- does it take to change a light bulb?
  None, because, look! It's getting brighter! It's definitely...
• How many Conservative economists -- does it take to change a light bulb?
  None. "There is no need to change the light bulb. All...
• How many economists -- does it take to screw in a light bulb?
  Two. One to assume the latter (a pun) and change the...
• How many supply-siders -- does it take to change a light bulb?
  None. The darkness will cause the light bulb to change...
• How many Marxists -- does it take to change a light bulb?
  None, the seeds of revolution and change are within...
• How many gnomes -- does it take to change a light light bulb?
  None. The light bulb keeps blowing up...
• How many psychologists -- does it take to change a light bulb?
  None. The bulb will change itself when it is ready...
• How many bassists -- does it take to screw in a light bulb?
  None. The keyboardist does it with his left hand...
• How many drummers -- does it take to change a light bulb?
  None. They have a machine that does that now...