Jason Lyall

Despite record numbers of internally displaced persons (IDPs) globally, we know little about the causal effects of intergroup contact between migrants and locals in active conflict settings. We conduct a randomized controlled trial of a vocational skills‐training program implemented by Mercy Corps that enrolled 2597 locals and migrants in near equal numbers in Kandahar, Afghanistan, where IDPs face daily prejudice and discrimination. Courses lasting up to 6 months emphasized collaborative learning and soft skills development. We surveyed participants at endline and followed up 8 months later. While the program provided the most sustained duration of intergroup contact (360–720 h) experimentally evaluated to date, we find no evidence of reported behavioral or attitudinal change by locals ( N = 1276) toward migrants generally, regardless of classroom demographics or course duration. Our findings suggest that prolonged contact through vocational training programs is insufficient to improve relations in conflict settings.