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 ...

This paper aims to measure the risk premium on French equities during 1960-92 and to evaluate how well theoretical models based on various representations of agents' preferences can explain it. Aside ...

Certain plausible independence properties lead to a quasi-additive utility function for life years and health status. Particular attention is given to utility functions for life years exhibiting ...