It’s Haley’s 21st birthday. She and Claire have decided to get coordinating tattoos. Claire got hers first and now Haley is having a change of heart. In this scene, we see time inconsistency and imperfect information. Haley is concerned that her preferences will change over time so she decides against getting the tattoo. Meanwhile, Claire already regrets her tattoo because Haley won’t be getting one – but it’s too late for Claire. Tattoos do not have a return policy! If Claire had known that Haley would change her mind, she would not have gotten a tattoo (imperfect information). This clip can also be used to compare and contrast two types of games in game theory – sequential games and simultaneous games. If you decide to get a tattoo with a friend but only because you’re doing it with a friend, make sure you get them simultaneously!

See more: behavioral, game theory, imperfect competition, intrinsic rewards, preferences, sequential moves, tastes and preferences, time inconsistency