Attack discrimination with smarter machine learning

If the goal is for the two groups to receive the same number of loans, then a natural criterion is demographic parity, where the bank uses loan thresholds that yield the same fraction of loans to each group. Or, as a computer scientist might put it, the “positive rate” is the same across both groups.In some contexts, this might be the right goal. In the situation in the diagram, though, there’s still something problematic: a demographic parity constraint only looks at loans given, not rates at which loa

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