Was the pope to blame? Statistical powerlessness and the predictive policing of micro-scale randomized control trials
Research Hinkle et al. (2013) highlighted a statistical powerlessness problem in hot-spots policing experiments in midsized cities with moderate property crime rates. The current work demonstrates that this problem is less readily resolved than previously suspected. It reviews results from a predict...
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| Format: | Electronic Article |
| Language: | English |
| Published: |
2020
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| In: |
Criminology & public policy
Year: 2020, Volume: 19, Issue: 3, Pages: 965-996 |
| Online Access: |
Volltext (Resolving-System) |
| Journals Online & Print: | Drawer...
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| Check availability: | HBZ Gateway |
| Keywords: |
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| 520 | |a Research Hinkle et al. (2013) highlighted a statistical powerlessness problem in hot-spots policing experiments in midsized cities with moderate property crime rates. The current work demonstrates that this problem is less readily resolved than previously suspected. It reviews results from a predictive policing randomized control trial in a large city with property crime rates higher than Chicago or Los Angeles. It reports, for the first time, a graphical analysis indicating the marked car patrol intervention, practically effective at the 500′ by 500′ (mission) grid level, three grids per shift, likely had a district-wide impact on reducing reported property crime. In addition, it reviews results of a series of thought experiments exploring statistical power impacts of four modified experimental designs. Only one alternative design, with spatially up-scaled predictive policing mission areas and concomitantly higher property crime prevalence rates, produced acceptable statistical power levels. Implications follow for current theoretical confusion in community criminology about concentration effects and units of analysis, and how models organize impacts across those different units. Implications follow for practice amid ongoing concerns about whether predictive policing works and, if it did, how to gauge its impacts and social justice costs. Policy Implications The current work brings to the fore important questions beyond “does predictive policing work?” Can we design predictive policing randomized experiments capable of showing statistical effectiveness? Furthermore, if we can, and if those studies include larger mission areas than the micro-scaled geographic grids used so far, how do we integrate social justice concerns into effectiveness metrics given the broader segments of communities likely affected? | ||
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| 650 | 4 | |a Effectiveness metrics and social justice concerns | |
| 650 | 4 | |a Hot-spots policing | |
| 650 | 4 | |a Predictive Policing | |
| 650 | 4 | |a Spatial and temporal scaling | |
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