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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)
Very often in decision problems with uni-or 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)
PURPOSE Cognitive deficits that are present in the acute stage of a focal hemispheric lesion tend to be greater and more general than residual deficits, which persist into the chronic stage. We have investigated the patterns of recovery and the relationship between deficits and damage to specialized networks taking as model auditory cognitive functions.(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)
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