Quants economistes calen per canviar una bombeta?


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 “mí  invisible” ho faci.