Better Together? A Field Experiment on Human-Algorithm Interaction in Child Protection

Marie-Pascale Grimon and Christopher Mills

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Abstract: Despite algorithms' potential to improve public services, adoption has been limited by concerns about effectiveness and equity. We conduct a randomized controlled trial ($N=4,681$) providing real-time algorithm support to Child Protective Services (CPS) workers allocating investigations. Algorithm access reduced maltreatment-related hospitalizations, especially among disadvantaged groups, while reducing CPS surveillance of Black children. Notably, child injury admissions decreased by 21 percent. Workers reallocated investigations toward children at greater likelihood of harm, without mechanically following algorithmic predictions. Discussion notes suggest the algorithm shifted worker attention to complementary information. Counterfactual exercises show that human-algorithm complementarity would outperform algorithmic automation in efficiency and equity.

Date: 2025-02, Revised 2026-02
New Economics Papers: this item is included in nep-exp
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Working Paper: Better Together? A Field Experiment on Human-Algorithm Interaction in Child Protection (2025)
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