“This is the largest examination of descriptive representation in policing to date,” Mummolo notes. “The ability to compare officers to their local jurisdictions on a large scale required extensive original data collection. Most studies in this area focus on a single jurisdiction, or use national surveys of officers scattered across the U.S., preventing local comparisons. We hope the approach to data collection we demonstrate in this study can provide a useful guide to expand the scope of studies in this literature.”