Mounting evidence documents a stark correlation between income and health, yet the causal mechanisms behind this gradient are poorly understood. This paper examines the impact of access to expertise on health, and whether unequal access to expertise contributes to the health-income gradient. Our...

Professions play a key role in determining the division of labor and the returns to skilled work. This paper studies the productivity difference between physicians and nurse practitioners (NPs), two health care professions performing overlapping tasks but with stark differences in background,...

This study investigates causal effects of changes in subjective probabilities of being pulled over and involved in accidents if driving while intoxicated on individuals' drinking and driving choices. We also examine how hypothetical changes in perceptions of sanction severity affect drunk...

Driving while intoxicated causes many traffic accidents and deaths. Two decisions are closely related, whether to engage in heavy drinking, and to drive, conditional on heavy drinking. This paper reviews the extensive literature on heavy drinking, addiction, and driving after heavy drinking....