How to Map and Combat Urban Organised Crime: Lessons from the Medellín Impact Lab

This briefing note provides insights on how novel approaches to measurement of less visible organised crime activities such as extortion, can be used to better diagnose problems and develop, test and iterate more effective response interventions. It offers an overview of how new data on extortion has been utilised as part of a cross-sector, collaborative Impact Lab approach to tackle the pervasive issue of organised crime groups’ extortion in Medellin.

Professor Christopher Blattman, Dr Benjamin Lessing, Professor Santiago Tobón

January 2025