Moral hazard--the tendency to change behavior when the cost of that behavior will be borne by others--is a particularly tricky question when considering health care. Kenneth J. Arrow's seminal 1963 paper on this topic (included in this volume) was one of the first to explore the implication of...

Those involved with the criminal justice system have disproportionately high rates of mental illness and substance use disorders, prompting speculation that health insurance, by improving treatment of these conditions, could reduce crime. Using the 2008 Oregon Health Insurance Experiment, which...