Refugee Flows, Ethnic Power Relations, and the Spread of Conflict

Why do some refugee flows cause conflict in the host state and others do not? Drawing on bargaining models of war, I argue refugees are especially likely to cause conflict when they alter the host state's ethnic balance of power. More specifically, I explain why multiple informational and commitment problems arise when refugee flows produce a rapid shift in relative power between ethnic groups. As an empirical strategy, I examine a unique controlled comparison made possible by the influx of Kosovar refugees into Albania and Macedonia in 1999 that eliminates over a dozen competing explanations for civil conflict. I then use process tracing to demonstrate how a change in relative power between ethnic groups fostered violence in Macedonia, whereas the preservation of the ethnic balance facilitated a peaceful refugee flow into Albania. This evidence, though tentative, indicates that a refugee flow's effect on the host state's ethnic balance of power can help explain whether the state experiences peace or conflict.