Econometrica: Jan 2002, Volume 70, Issue 1

Individual Sense of Justice: A Utility Representation

https://doi.org/10.1111/1468-0262.00275
p. 263-284

Edi Karni, Zvi Safra

We present an axiomatic model depicting the choice behavior of a self‐interest seeking moral individual over random allocation procedures. Individual preferences are decomposed into a self‐interest component and a component representing the individual's moral value judgment. Each component has a distinct utility representation, and the preference relation depicting the choice behavior is representable by a real‐valued function defined on the components utilities. The utility representing the self‐interest component is linear and the utility representing the individual's moral value judgment is quasi‐concave. The addition of a hexagon condition implies that the utility representing the individual's preference is additively separable in the components utilities.

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