Transnational Terrorist Recruitment: Evidence from Daesh Personnel Records
利用达伊沙（伊拉克和黎凡特伊斯兰国）的人事档案，研究发现输出国的失业率与跨国恐怖分子招募人数正相关，但长途旅行成本会削弱这一效应。
Abstract Global terrorist organizations attract radicalized individuals across borders and constitute a threat for both sending and receiving countries. We use unique personnel records from the Islamic State in Iraq and the Levant (Daesh) to show that unemployment in sending countries is associated with the number of transnational terrorist recruits from these countries. The relationship is spatially heterogeneous, which is most plausibly attributable to travel costs. We argue that poor labor market opportunities generally push more individuals to join terrorist organizations, but at the same time, limit their ability to do so when longer travel distances imply higher travel costs.