Sterling Huang and David Throsby write on quantitative political, economic, and social determinants of peace. Vincenzo Bove studies the theory of supply and demand for peacekeeping. Alvaro Riascos and Juan Vargas review the quantitative literature on violence and economic growth in Colombia. Zachary Tambudzai examines determinants of military expenditure in Zimbabwe. Steve Pickering questions the supposed "bellicosity" of mountain people. John Gilbert, Krit Linananda, Tanigawa Takahiko, Edward Tower, and Alongkorn Tuncharoenlarp study the deadweight cost of war with an illustrative computable general equilibrium (CGE) model.