Aaron Chalfin Profile picture
Associate Professor of Criminology @Penn, research associate @nberpubs, senior fellow @NiskanenCenter and research affiliate @UChiUrbanLabs

Nov 27, 2021, 7 tweets

There is a bunch of new research out there on the effects of body-worn cameras (BWCs) worn by police officers. Short thread summarizing four new papers 👇

Experimental evidence using precinct-level random assignment that BWCs reduced citizen complaints and increased the reporting of stops by NYC police officers by Anthony Braga, John MacDonald and James McCabe:
onlinelibrary.wiley.com/doi/abs/10.111…

Evidence from the same experiment with the NYPD that BWCs do not improve satisfaction with police officers, based on a survey of people who have had contact with the police. Paper by Anthony Braga, John MacDonald and @lmbar16: link.springer.com/article/10.100…

Using a survey experiment, @btregle, @jnixy and @JustinTPickett find that 1) police executives don't support laws that mandate the sharing of BWC footage w/ the public & 2) suspect race and armed status shaped executives' expectations of media coverage.
tandfonline.com/doi/full/10.10…

Research by @KathrynBollman finds that BWCs ▶️ 10% reduction in new case filings for offenses initiated during a police interaction but finds no effects on case disposition, sentencing or racial disparities.
github.com/katiebollman/W…

The newest meta analysis of the effects of BWCs by @MWillJr et al is here: nber.org/papers/w28622

There is another recent systematic review of BWCs by Cynthia Lum et al here: eprints.qut.edu.au/205611/

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