How many economists does it take to change a light bulb?
1. Seven plus or minus ten.
2. Irrelevant - the light bulb's preferences are to be taken as given.
3. Eight. One to screw it in and seven to hold everything else constant.
2. Irrelevant - the light bulb's preferences are to be taken as given.
3. Eight. One to screw it in and seven to hold everything else constant.