Black Lives Matter protests have put a spotlight on police abuses since 2014, but it has been challenging for  researchers to assess the impact of race from the available data.  In a paper in the American Economic Review, authors Mark Hoekstra and CarlyWill Sloan found that White officers use force more frequently than Black officers, especially in Black neighborhoods.  Sloan says that their work is a step toward showing that some police departments may have systemic race problems rather than just a few high-profile, one-off incidents. She recently spoke with Tyler Smith about the challenges of studying officer–civilian interactions and the lessons her work might have for US police departments.