Nathan Witkin is a second-year MPP student who practiced law and served as a mediator for 10 years before enrolling at McCourt to study public policy innovation. His ideas published outside GPPR include the interspersed nation-state system, interest group mediation, dependent advocacy, a police-community partnership model for citizen review boards, a novel framework for sovereignty in a globalizing world, co-resolution, consensus arbitration, executive bargaining, a theory of impact bonds, and an alternative explanation of gravity.