This workshop aimed to spur a sustained research effort to better understand prominent empirical regularities about crime that integrate economic and sociological perspectives on social interactions. Examples of the sorts of regularities that we seek to understand are concentrations of crime at discrete locations such as specific street corners called crime hotspots and rapid shifts in crime rates such as the more than 50% increase in homicide in Chicago between 2015 and 2016. Many explanations have been offered for such regularities but all fall short on one very important dimension. They do not give adequate consideration to the role of social interactions in the determination of crime rate. Crime is appropriately understood as a reflection of a very complex equilibrium process, played out in varying community contexts, involving would-be criminals and victims (who may be actors in both roles) and agents of the criminal justice systems. This integrative perspective was the focus of the workshop.