Equally-distributed equivalent utility, ex post egalitarianism and utilitarianism
We provide an axiomatization of expected equally-distributed equivalent-utility social welfare functions in the context of Harsanyi's impartial observer theorem. For this family of social welfare functions, we show what additional axiom is necessary and sufficient for the observer to exhibit aversion to ex post inequality. We also relate this axiomatization to our axiomatization in a companion paper of generalized utilitarian social welfare functions. Given certain richness assumptions, the only social welfare functions that belong to both families are the utilitarian.
Utilitarianism, Harsanyi's (impartial) observer, Social welfare function, Ex post egalitarianism
Journal of Economic Theory
Grant, Simon; KAJII, Atsushi; Polak, Ben; and Safra, Ziv.
Equally-distributed equivalent utility, ex post egalitarianism and utilitarianism. (2012). Journal of Economic Theory. 147, (4), 1545-1571. Research Collection School Of Economics.
Available at: http://ink.library.smu.edu.sg/soe_research/1853