Body-worn cameras may produce varying effects on police behavior, depending on the agency-specific accountability context in which the technology adoption is embedded. The cameras may encourage coercive police actions when acquired to incentivize performance, such as by protecting officers from false complaints. By contrast, when acquired to enhance procedural accountability, such as by enabling closer scrutiny of officer misconduct, the cameras may discourage coercive police actions. Based on this framework, this study examined the case of the New Orleans Police Department, an agency that implemented a body-worn camera program to enhance both performance and procedural accountability. Results of Bayesian structural time-series modeling with synthetic control show that the program increased the number of investigatory stops and follow-up measures (i.e., frisk, search, citation, arrest) while decreasing the ratio of more-to-less coercive measures during stops (i.e., arrest/citation-to-warning ratio and search-to-frisk ratio). However, the program had a null effect on the minority-to-White suspect ratio, despite the agency's bias-free policing initiative. The percentage of frisks and searches detecting drugs or weapons also declined. A broader implication of the findings is that technology-based monitoring mechanisms are important, but not a silver bullet for improving the behavior of street-level bureaucrats.

中文翻译：

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基于技术的监控如何影响街道官员的行为？对随身摄像头和警察行动的分析

执法记录仪可能会对警察的行为产生不同的影响，具体取决于技术采用所嵌入的特定机构的问责环境。这些摄像头在获得后可能会鼓励警察采取强制行动，以激励警察的表现，例如保护警察免受虚假投诉。相比之下，当摄像头用于加强程序问责时，例如通过对官员的不当行为进行更严格的审查，摄像头可能会阻止警察的强制行动。基于此框架，本研究考察了新奥尔良警察局的案例，该机构实施了随身摄像头计划，以提高绩效和程序问责制。具有综合控制的贝叶斯结构时间序列模型的结果表明，该程序增加了调查停止和后续措施（即搜查、搜查、传票、逮捕）的数量，同时降低了期间多强制措施与少强制措施的比例。停止（即逮捕/传票与警告之比和搜查与搜查之比）。然而，尽管该机构采取了无偏见的警务举措，但该计划对少数族裔与白人嫌疑人的比例没有影响。发现毒品或武器的搜身和搜查百分比也有所下降。