1. Harvard Kennedy School, 33574, Cambridge, Massachusetts, United States;
2. University of Michigan, 1259, Business, 701 Tappan Avenue, Ann Arbor, Michigan, United States, 48109-1382;
3. ETH Zürich, 27219, Mediation in Peace Processes, Zurich, ZH, Switzerland;
4. University of Michigan, 1259, Business, Ann Arbor, Michigan, United States;