From the Nobel Prize-winning author ofThinking, Fast and Slowand the coauthor ofNudge,a revolutionary exploration of why people make bad judgments and how to make better ones—"a tour de force” (New York Times).Imagine that two doctors in the same city give different diagnoses to identical patients—or that two judges in the same courthouse give markedly different sentences to people who have committed the same crime. Suppose that different interviewers at the same firm make different decisions about indistinguishable job applicants—or that when a company is handling customer complaints, the resolution depends on who happens to answer the phone. Now imagine that the same doctor, the same judge, the same interviewer, or the same customer service agent makes different decisions depending on whether it is morning or afternoon, or Monday...