Necessary and sufficient conditions for the addivity of ordinal utility functions are well known. In this paper a necessary and sufficient condition for the addivity of von Neumann-Morgenstern utility ...

Under a finiteness restriction, an additivity axiom leads to an additive utility representation for the elements in X. The potential usefulness of the theory in connection with incomplete product sets ...

Objective The study objective was to develop a function to predict PORPUS-U utility scores from PCI scores.