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Tim Harford explains the numbers and statistics in the news and in life

Tim Harford explains the numbers and statistics in the news and in life.

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Algorithms, Crime and Punishment

14/10/2016 GMT

BBC World Service - More or Less, Algorithms, Crime and Punishment

A drive-by shooting in the US midwest has raised fundamental questions about how algorithms are being used in the country's criminal justice system. A defendant in the case was put behind bars after an algorithm used by the court calculated that he was at high risk of reoffending. The risk assessment algorithm crunches data about defendants' past criminal history and from their answers to a questionnaire to come up with the risk score. It's supposed to help make decisions less subjective, but one recent analysis found that the algorithm was biased against black people.

(Photo: A guard walking down a cell block. Credit: Getty Images)

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