Aggregation and self-sacrifice

Should harms to different individuals be aggregated? Moderate views answer yes and no. Aggregation is appropriate in some but not all cases. Such views need to determine a threshold at which aggregation switches from appropriate to inappropriate. Alex Voorhoeve proposes a method for determining this threshold which links other-regarding and self-regarding ethics. This proposal, however, implies a spurious correlation between favoring aggregation and egoism.