Safety, Security & Governance
24 min
You Cannot Have All Three: COMPAS, Calibration and the Impossibility Theorems of Fair Classification
In 2016 ProPublica showed that COMPAS wrongly flagged 44.9% of Black defendants who never reoffended against 23.5% of white ones, and its vendor showed the scores meant the same thing for both groups. Both were right, and a one-l…