How many economists does it take to change a lightbulb?
- a) Two: One to change the bulb and one to assume the existence of a ladder.
- b) Eight: One to screw in the light bulb and seven to hold everything else constant.
- c) None: They are all waiting for an invisible hand.
Quants economistes calen per canviar una bombeta?
- a) Dos: Un per canviar la bombeta i un altre per assumir l’existència d’una escala.
- b) Vuit: Un per enroscar la bombeta i set per mantenir tota la resta constant.
- c) Cap: Només cal esperar que la “mà invisible” ho faci.
