Underrepresentation of subgroups creates proportional bias beyond direct discrimination

Evidence

“Proportional bias” also should be taken into account. For example, there may be an underrepresentation of White drug offenders in a given data set. — Joseph Avery, Jim Sidanius, Joel Cooper, Gregory Davis, Amanda N., Bias in the Law, 1186

Categorization

• QUESTION: Worth chasing: how should underrepresentation of a group be handled versus overrepresentation in algorithmic fairness?
• SEED: Article angle: the rarely-discussed mirror case where a group is underrepresented in biased training data.