How Many Conservative Economists -- Does It Take To Change A Light Bulb?

How many Conservative economists -- does it take to change a light bulb?
None. The invisible hand does it....
How many gnomes -- does it take to change a light light bulb?
None. The light bulb keeps blowing up....
How many Conservative economists -- does it take to change a light bulb?
None, because, look! It's getting brighter! It's definitely getting brighter !!!...
How many Marxists -- does it take to change a light bulb?
None, the seeds of revolution and change are within the light bulb itself....
How many supply-siders -- does it take to change a light bulb?
None. The darkness will cause the light bulb to change by itself....
How many (Generals/Politicians) -- does it take to change a light bulb?
None, they can all see by the light at the end of the tunnel....
How many economists -- does it take to screw in a light bulb?
Two. One to assume the latter (a pun) and change the bulb....
How many psychologists -- does it take to change a light bulb?
None. The bulb will change itself when it is ready....
How many smokers -- does it take to change a light bulb?
At least five. If they all light up together the light bulb will do so too....