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Anger, legacies of violence, and group conflict: An experiment in post-riot Acre, Israel

Extant research hypothesizes that anger over past intergroup conflict serves as a catalyst for future conflict. However, few studies have experimentally tested this hypothesis on a representative sample in a high-stakes, field setting. I use a behavioral economics experiment to measure how anger over past conflict influences intergroup relations. Subjects were sampled proportional to population and ethnicity in Acre, Israel, a mixed city of Jews and Palestinian Citizens of Israel that experienced ethnic riots in 2008. The experiment randomly assigned subjects to an anger treatment about the riots or a neutral condition. Subjects then allocated income between themselves and three partners: one from their ingroup, one from their outgroup, and one whose identity was unclear. I find that priming anger over the riots did not increase discrimination. Rather, it reduced altruism to all groups, and this result was strongest for “high aggression” types. Qualitative information suggests that blame for the riots falls on both ingroup and outgroup members.