Fairness Impossibility Theorem

Some metrics aren’t compatible with other metrics of fairness.

• Predictive accuracy of the best college students from SAT scores (yields to priviledged class)

Theorem

Predictive Parity and Classification Parity are not equal accuracy Alternatively, Calibration and Statistical Parity by Status are in tension.

Proof

https://www.marcellodibello.com/algorithmicfairness/handout/impossibility.html