The problems of medical care confront us daily: a bureaucracy that makes a trip to the doctor worse than a trip to the dentist, doctors who can't practice medicine the way they choose, more than 40 million people without health insurance. "Medical care is in crisis," we are repeatedly told, and so it is. Barely one in five Americans thinks the medical system works well.
Enter David M. Cutler, a Harvard economist who served on President Clinton's...