The Sunk Cost Fallacy: Why You Keep Watching a Bad Movie, Staying in a Bad Job, or Finishing a Bad Relationship
Two hours into a movie you've hated since the opening scene, you're still sitting there. Not because the second half might redeem it. You already suspect it won't. You're sitting there because you paid for the ticket, and leaving now would feel like admitting that money was wasted. Never mind that the money is already gone either way, whether you sit through the ending or walk out right now. This same broken logic, dressed up in far more serious clothing, is what keeps people in careers they've outgrown, relationships that stopped working years ago, and courses of study they lost interest in halfway through. It has a name, and once you learn to spot it, it becomes genuinely hard to unsee. The Experiment That Named This Pattern In 1985, psychologists Hal Arkes and Catherine Blumer published a paper called "The Psychology of Sunk Cost" that gave this behaviour its formal name and its first rigorous experimental proof. In one of their classic scen...