Fair Social Ordering, Egalitarianism, and Animal Welfare
研究了人类消费私人物品和代表其他物种福利的公共物品时的公平问题，发现社会评价者无法在尊重人类一致偏好的同时实现人类间的平等，并提出一种解决方案：仅在不会降低其他物种福利时才尊重一致偏好。
We study fairness in economies where humans consume one private good and one public good representing the welfare of other species. We show that a social evaluator cannot be egalitarian with respect to humans while always respecting humans’ unanimous preferences. One solution is to respect unanimous preferences only when doing so does not lead to a decrease in the welfare of other species. Social preferences satisfying these properties reveal surprising connections between concerns for other species, egalitarianism among humans, and unanimity: the latter two imply a form of dictatorship from humans with the strongest preference for the welfare of other species.