What if everything we understood about gun violence was wrong? In 2007, economist Jens Ludwig moved to the South Side of Chicago to research two big questions: Why does gun violence happen, and is there anything we can do about it? Almost two decades later, the answers aren’t what he expected. This seminar (based on a forthcoming book) describes how and why everyone’s conventional wisdom about gun violence is at best incomplete, how behavioral economics gives us a better way to understand the problem, and how a sustained partnership between the University of Chicago Crime Lab and the city of Chicago have helped identify and scale new solutions.