How can the state re-establish control after decades of civil war? Which public policies best reduce levels of lethal and non-lethal violence in the world's most dangerous cities? What role do ordinary citizens play in peacebuilding? How do legacies of violence shape contemporary outcomes?
To answer these questions -- in Colombia, Mexico, El Salvador, Honduras, and Guatemala -- I work with international organizations, national and local governments, and use a combination of primarily experimental and quasi-experimental quantitative methods.