Béatrice Rey

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Decisions under risk are often multidimensional, where the preferences of the decision maker depend on several attributes. For example, an individual might be concerned about both her level of wealth and the condition of her health. Many times the signs of successive cross derivatives of a utility function play an important role in these models. However,(More)
Empirical evidence suggests the existence of a positive relationship between fear of sickness (FS) - as measured by the level of future utility lost when sickness occurs - and the level of effort to prevent the occurrence of sickness. By looking theoretically at this issue, we develop new results on the determinants of optimal prevention for health risks.(More)
This paper analyzes effects of nonpoint source pollution on regulation optimal contracts in asymmetric information situation. We consider a continuum of agents (to formalize major characteristic of nonpoint source pollution) which pollute another agent (affected agent). We distinguish different forms of externalities and examine if it is always necessary to(More)
Very often in decision problems with unior multivariate objective, many results depend upon the signs of successive direct or cross derivatives of the utility function at least up to the 4th order. The purpose of the present paper is to provide a new and unified interpretation of these signs. It is based on the observation that decision-makers like to(More)
This paper examines how priority setting in health care expenditures is influenced by the presence of uncertainty about the severity of the illness and the effectiveness of medical treatment. We provide necessary and sufficient conditions on social preferences under which a social planner will allocate more health care resources to populations at higher(More)
This paper investigates the notion of treatment threshold for preventive treatment with potential side effects in the context of changes in risk. Changes in risk are defined by the concept of nth-order stochastic dominance and concern the effectiveness of preventive treatment, side effects, severity of the potential disease, and comorbidity risk. The impact(More)
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