Objectives

We examine the potential effects of gunshot detection technology longitudinally in Chicago through a synthetic control quasi-experiment.

Methods

Police districts receiving gunshot detection technology were compared to a synthetic control unit via a staggered difference-in-difference design. Across eleven unique gunshot detection technology deployment phases, the analyses produce results for aggregate, initial versus expanded, and phase-specific deployment effects across five gun violence outcome measures.

Results

Gunshot detection technology had no effect on fatal shootings, non-fatal shootings, general part I gun crimes, or shots fired calls for service. Gun recoveries significantly increased in the aggregate, initial, and expanded models, and in several individual phases relative to controls.

Conclusions

The results align with prior literature that has found a procedural benefit, but not a crime prevention benefit, of gunshot detection technology. Law enforcement agencies seeking crime prevention or reduction solutions may be better served by investing in other options.

中文翻译：

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伊利诺伊州芝加哥交错部署枪击检测技术：枪支暴力结果的匹配准实验

目标

我们通过综合控制准实验在芝加哥纵向研究枪击检测技术的潜在影响。

方法

通过交错差分设计，将接受枪击检测技术的警区与综合控制单元进行比较。在十一个独特的枪击检测技术部署阶段中，这些分析产生了五个枪支暴力结果指标的总体、初始与扩展以及特定阶段部署效果的结果。

结果

枪击检测技术对致命枪击、非致命枪击、一般第一部分枪支犯罪或开枪求助没有影响。与对照相比，在总体模型、初始模型和扩展模型以及几个单独阶段中，枪支回收率显着增加。

结论

结果与先前的文献一致，该文献发现枪击检测技术具有程序上的好处，但没有预防犯罪的好处。寻求预防或减少犯罪解决方案的执法机构通过投资其他选择可能会得到更好的服务。