R port of morie.fairness.temporal. Reimplements Barman &
Barman, Unmasking Algorithmic Bias in Predictive Policing
(arXiv:2603.18987): the four disparity metrics - Disparate Impact
Ratio, Demographic Parity Gap, Gini coefficient, and Bias
Amplification Score - are computed for every (city,
period) cell and assembled into a time series so that
temporal instability and cross-city divergence
become visible.
Details
Builds on the metrics in fairness_metrics.