Objectives

This study tests whether Problem-Oriented Policing (POP) in hot spots of crime reduces property and violent crime in three cities, comparing POP versus control hot spots. We also examined low-levels versus high-levels of POP versus control on crime separately for pre-, during- and post-intervention.

Methods

This paper reports on a randomized controlled trial of POP replicated in three communities over one year using Poisson and negative binomial regression models.

Results

We did not find any significant intervention effect on violent crimes post intervention in any of the three sites but observed some unintended iatrogenic/negative effect of lowlevel treatment on property crimes in two sites.

Conclusions

Due to difficulties experienced in implementing POP, we caution against concluding POP does not work. Instead, low level POP implementation during the era of post COVID-19 and anti-policing sentiment post the George Floyd murder may not be effective in reducing property and violent crime.

中文翻译：

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以青少年为中心、以问题为导向的警务举措对犯罪的影响：三个城市的随机对照试验的结果

 目标

本研究通过比较 POP 与控制热点，测试犯罪热点地区的问题导向警务 (POP) 是否可以减少三个城市的财产犯罪和暴力犯罪。我们还分别研究了干预前、干预期间和干预后的低水平和高水平持久性有机污染物与犯罪控制的情况。

 方法

本文报告了一项使用泊松和负二项式回归模型在三个社区重复一年多的 POP 随机对照试验。

 结果

我们在这三个地点的任何一个地点都没有发现干预后对暴力犯罪有任何显着的干预效果，但在两个地点观察到低水平治疗对财产犯罪产生了一些意想不到的医源性/负面影响。

 结论

由于实施 POP 过程中遇到困难，我们谨慎对待 POP 不起作用的结论。相反，后 COVID-19 时代的低水平 POP 实施以及乔治·弗洛伊德谋杀案后的反警察情绪可能无法有效减少财产犯罪和暴力犯罪。