Scholars of international conflict mediation have made strides in the last two decades in understanding when mediation occurs and when it is successful. The rationalist framework has allowed theorists to sharpen and expand on early insights, and research using quantitative methods continues to be an important part of the field. Gaining a sense of when disputants might use mediation disingenuously and expanding the scope and comparability of data sets on mediation will push both the study and practice of mediation onto useful new ground.      Keywords:    mediation,  conflict resolution,  peacemaking,  negotiation,  diplomacy,  international conflict,  intrastate conflict,  peace processes