Inequity aversion and the stability of majority rule

Despite the empirical support for other-regarding behavior in humans, spatial voting theory has largely overlooked the role of social preferences. This work takes the perspective that individuals not only harbour selfish preferences regarding material possessions, but also experience emotions such as envy and guilt regarding the possessions of others. By exploring how these emotions, manifested as inequity aversion, shape collective decision-making, this research deviates from the predominant focus on self-interest. Instead, it delves into the influence of guilt and envy on distributive politics, proposing two sensible constraints on these emotions, called limited and chained other-regardingness. These domain conditions on social preferences are aligned with the empirical estimates of inequity aversion; and they aim to ensure the stability (non-emptiness), uniqueness, and fairness of the majority-rule core.