The Influence of International Organizations on Militarized Dispute Initiation and Duration1

We argue that international organizations decrease the duration of international conflicts by mitigating commitment problems and encouraging combatants to cease hostilities more quickly. Empirical analyses of militarized interstate dispute duration (1950–2000) reveal that increasing shared international organization (IO) participation reduces the length of disputes, even after accounting for selection into international conflict. We also find that international organizations designed to mitigate commitment problems decrease dispute duration, while IOs capable of reducing information asymmetries do not influence dispute length.