Measures of health status, such as e.g. the QALY (Quality Adjusted Life Years) measure, have been proposed as a tool in the economic assessment of new medical technologies, and its possible foundations in individual utility theory have been discussed in the literature. However, the problems of...

The present paper follows the line of the effectivity function approach to social choice theory. We discuss core selections and present a non-neutral core selection, the P-subcore, and we rank this with two other core selections. We conclude by presenting a characterization of strongly...

In this paper, we present a characterization of social choice correspondences which can be implemented in strong Nash equilibrium, stated in terms of the power structure implicit in the social choice rule. We extend the notion of an effectivity function to allow for simultaneous vetoing by...

We introduce a description of the power structure which is inherent in a strategic game form using the concept of an interaction sheaf. The latter assigns to each open set of outcomes a set of interaction arrays, specifying the changes that coalitions can make if outcome belongs to this open...

The idea of treating factor price equalization as a situation, where the distribution of factors among countries is compatible with an equilibrium in an integrated world economy, has been refined to give the so-called lens condition for factor price equalization. In this paper, we show that the...

The paper introduces an abstract economy with imperfect competition; the choice of allocation takes place through an abstract mechanism, when produceres choose strategies and the outcome is (a set of) feasible allocations, where the consumers' choices are sustained by the market mechanism at...

We introduce a description of the power structure which is inherent in a strategic game form using the concept of an interaction sheaf. The latter assigns to each open set of outcomes a set of interaction arrays, specifying the changes that coalitions can make if outcome belongs to this open...