Amy, Betty, and Carla are competitors in a local market, and each is trying to decide if it is worthwhile to advertise. If all of them advertise, each will earn a profit of $165,000. If none of them advertise, each will earn a profit of $195,000. If only one of them advertises, the one who advertises will earn a profit of $220,000 and the other two will each earn $150,000. If two of them advertise, those two will each earn a profit of $190,000 and the other one will earn $130,000. If all three follow their dominant strategy, Betty will advertise and earn $165,000.