Measuring organised crime: challenges and solutions for collecting data on armed illicit groups

Organised criminal activities, by their nature, are hard to measure. Administrative data are often missing, problematic, or misleading. Moreover, organised criminal activities are under-reported, and under-reporting rates may be greatest where gangs are strongest. Here we draw on our experience in Colombia, Brazil, and Liberia of collecting systematic data on illicit activities and armed groups, in order to share our learning with other researchers or organisations that fund research in this area, who may find this useful for their own research. We address: first steps before asking questions, common challenges and solutions, and alternative sources.

Christopher Blattman, Benjamin Lessing, Juan Pablo Mesa-Mejía & Santiago Tobón

May 2022