This paper provides an axiomatic approach to the problem of measuring the informationcontained in opportunity sets. In many choice situations, the items that can be selectedfrom an opportunity set (the objects of choice) do not coincide with the consequencesthey induce (the objects a...

We examine the possibilities of extending Sen?s taxonomy of fixed-population information assumptions regarding the measurability and interpersonal comparability of individual utilities to social-choice problems where the population may vary. It is shown that in order to avoid impossibility...

Les Essais Que Nous Publions Dans Ce Recueil Refletent Plusieurs Themes de la Recherche Actuelle Sur L'economie de L'incertain et de L'information. Certes, Ils Ne Contiennent Pas Tous les Sujets Etudies Mais Donnent une Bonne Vue D'ensemble des Developpements Prodigieux (Mais Parfois Decevants)...