We discuss the existence and the qualitative properties of equilibria when agents have multiple priors and there is only one good in each state of the world. We first prove a general existence result in infinite dimension economies. We then fully describe the equilibria in two special cases. We...

We develop a "welfarist" model in which the collective demand for health insurance is mainly explained by a solvability motive : health insurance does not have for principal function to treat the risk aversion of solvent agents but to make it possible to individuals who are too poor to assume...

Relationship marketing makes an implicit assumption : customers are committed. This commitment is based on the existing trust between the customer and the service provider. However, customers may reject commitment, because of psychological reactance, without any loss of trust. This article...

The paper presents a comprehensive analysis of the perception of the Enron collapse by certain students at the French business school "INT Management". Cognitive mapping illustrates the assimilation of the issue by students with regard to their own culture and values. The conclusions of this...