@TechReport{iza:izadps:dp18528,
            	author={Harrington, Emma and Shaffer, Hannah},
            	title={Learning About Police Bias: Prosecutors and Police Before and After Body-Worn Cameras},
            	year={2026},
	month={Apr},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={18528},
            	url={https://www.iza.org/index.php/publications/dp18528},
	abstract={Decision-makers often rely on earlier actors but fail to correct for their biases. We model and measure two mechanisms: underestimating upstream bias and treating subjective information as ground truth. We link an original survey of 203 North Carolina prosecutors to their 505,787 cases. Exploiting the rollout of police body-worn cameras (BWC), we show monitoring reduces incarceration disparities by 14 percent, little of which is driven by arrests. About one quarter of this effect reflects learning: prosecutors with greater BWC exposure view police as more biased and unreliable. Monitoring reduces disparities most for prosecutors who treat police reports as ground truth.},
	keywords={systemic discrimination;biased beliefs;monitoring;bodyworn cameras;prosecutorial discretion;racial disparities;criminal justice system},
            }