Monitoring Technology: The Impact of Body-Worn Cameras on Citizen-Police Interactions
基于巴西2018年的实验，发现警察佩戴随身摄像头使武力使用减少61.2%，不良互动减少47.0%，并提升了报告质量，表明该技术有助于缓和冲突。
Abstract We provide experimental evidence that using body-worn cameras (BWCs) for police monitoring improves police-citizen interactions. In an intervention carried out in Brazil in 2018, we find that treated incidents show a 61.2% decrease in police use of force and a 47.0% reduction in adverse interactions, including handcuff use and arrests. The use of body-worn cameras also significantly improves the quality of police reporting. The rate of incomplete reports dropped by 5.9%, which is accompanied by a 69.2% increase in reported incidents of domestic violence. We explore various mechanisms that explain why BWCs work and show that the results are consistent with the police changing their behavior in the presence of cameras. Overall, results show that the use of body-worn cameras de-escalates conflicts.