4 Items

a Syrian army tank firing during a battle against Islamic State militants in Deir el-Zour

SANA via AP, File

Analysis & Opinions - Foreign Affairs

The Death and Life of Terrorist Networks

| Oct. 05, 2020

The authors explain why over recent decades, militant groups with the kind of vast international network of affiliates, allies, and supporters that ISIS has assembled have proved difficult to defeat. Alliances have helped ISIS expand and gain influence in good times and have relieved pressure by deflecting attention toward affiliates in bad times. 

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Discussion Paper - Belfer Center for Science and International Affairs, Harvard Kennedy School

Does Costly Signaling Matter? Preliminary Evidence from a Field Experiment

| October 2008

This paper presents a preliminary experiment designed to determine whether costly signaling plays a role in political interactions. Drawing on the expansive signaling literature in international relations and elsewhere, we propose that the quality of solicitation materials matters because voters respond to costly signals from candidates as a shortcut for determining both a candidate’s investment in their own campaign and the degree of commitment from other voters to that candidate’s cause.