Macroeconomists, like medical scientists, use case studies to teach their students about the maladies to which the system is susceptible. For supply shocks and stagflation, the example is the 1970s. The financial dislocations that occur when bubbles burst are illustrated by the Great Depression and Japan’s problems in the 1990s. The importance of central bank credibility in resisting inflation emerges from discussion of the experience of the late 1960s and the 1970s.