One of the challenges of public policy design is accounting for the inevitable conflicts between individual, economic and community interests. Such scenarios are common in public-health and environmental contexts, from the classic tragedy-of-the-commons dilemma to free-rider problems in preventative medicine. Policies that optimize for one set of interests are often ineffective because they rely on idealized assumptions about the behaviors of competing interests. Recent work has argued that a broader, multi-disciplinary approach to competing interests will lead to more robust public policies. This workshop will focus on the integration of epidemiology, behavioral science, economics, and mathematics to better understand these conflicts.