"The terrible trade-off: Why governments must choose between more violence or stronger gangs," Modern War Institute at West Point (with Chris Blattman and Ben Lessing). [Discussion Paper] (2022)

"Measuring organised crime: challenges and solutions for collecting data on armed illicit groups," SOC ACE Serious Organised Crime & Anti-Corruption, Briefing Note 3 (with Chris Blattman, Ben Lessing and Juan Pablo Mesa-Mejía). [Discussion Paper] (2022)

"The terrible trade off: how the hidden cost of organised crime harms cities, and what can be done about it," SOC ACE Serious Organised Crime & Anti-Corruption, Briefing Note 4 (with Chris Blattman and Ben Lessing). [Discussion Paper] (2022)

"Crime trajectories in times of COVID-19: The case of Colombia," IDB Technical Report, 2034  (with Nathalie Alvarado, Ervyn Norza, Santiago Pérez-Vincent and Martín Vanegas-Arias). [Discussion Paper | Outreach: Sin Miedos  - IADB] (2020)

"Crime in the time of covid-19," Economic Development and Institutions Report, COVID-19 Essay Series (with Chris Blattman, David Cerero, Gustavo Duncan, Sebastian Hernandez, Ben Lessing, Juan Felipe Martinez, Juan Pablo Mesa-Mejía and Helena Montoya). [Discussion Paper] (2020)

"What works to prevent violence among youth? A white paper on youth violence, crime prevention and the Mexican context," USAID Report, AID-523- C-15-00002 (with Thomas Abt, Chris Blattman and Beatriz Magaloni). [Report, Spanish version, Policy brief] (2018)

"Sector Wide Impact Assessment on Human Rights: Mining Unseen," Institute for Human Rights and Business Report (with Luis Fernando De Angulo, Camila Miranda, Blanca Llorente, Natalia Torres, Alejandra Castillo, Margaret Wachenfeld, Andreé Viana and Viviana Arango). [Report] (2016)

Investing in prison quality: A cost-effective way to reduce recidivism, VoxDev (2023)

La paz posible con el crimen organizado, El Espectador. (2022)

El terrible dilema para reducir la violencia organizada: El caso de Medellín, Nada es gratis. (2022)

La especialización y el aprendizaje criminal en las cárceles, Foco Económico. (2022)

Reflexiones sobre crimen y violencia, speech after receiving the Juan Luis Londoño Medal 2020. (2021)

Mejorar la calidad de vida de los presos: una inversión rentable, Razón Pública. (2020)

COVID-19 y crimen: Los grandes retos en la pandemia, Sin Miedos - Banco Interamericano de Desarrollo. (2020)

Gobierno criminal: ¿Qué es y cómo enfrentarlo?, Foco Económico. (2020)

Colombia necesita más que una reforma policial, La Silla Vacía (with Isabel Gutiérrez). (2020)

El COVID vuelve a abrir el debate sobre el salario mínimo, La Silla Vacía. (2020)

Presos colombianos: Hacinados y sin salud, Razón Pública. (2016)

De policía militarizada a policía comunitaria, Razón Pública (with Isabel Gutiérrez). (2016)

Cárceles en Colombia: Un sistema que colapsó, Razón Pública (with Isabel Gutiérrez). (2015)

Política de drogas en Colombia: Congestión y corrupción, otras caras del fracaso, Razón Pública (with Isabel Gutiérrez). (2015)

Probable causation, Episode 61