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The Police Response Effort Index quantifies police demand, indicating how resources can adapt to high-effort incidents.
The Police Response Effort Index (PREI) is a method for measuring demand for police service that involves weighting demand incidents by the average time it takes police to resolve them. A police organization can calculate its own PREI weight values using Computer Aided Dispatch data on the time police spend on scene during their initial response. Police can use a PREI to target resources to high effort people and places, test whether initiatives reduce effort, and track changes in demand that traditional counts may mask.
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Curtis‐Ham et al. (2025) studied this question.
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