Research by Assistant Professor of Public Policy Emily Weisburst was cited in a Star Tribune opinion piece about racial disparities associated with police presence and crime. Weisburst co-authored a paper that looked at changes in police force size, crime and arrests in 242 large American cities over nearly 40 years in order to draw conclusions about the impact of police presence on different populations. They found that “investments in law enforcement save Black lives … but at the cost of more low-level ‘quality of life’ arrests and all the insults and injuries of intensive policing.” The authors calculated that, on average, one homicide is prevented per year for every 10 to 17 additional police officers employed, but the number of street arrests for low-level offenses, especially for Black civilians, also increases with greater police presence. The paper concludes that “Black communities are simultaneously over- and under-policed.”