This paper provides a fixed point theorem à la Schauder, where the mappings considered are possibly discontinuous. Our main result generalizes and unifies several well-known results.

In some situations, a decision is best represented by an incompletely analyzed act : conditionally to a given event A, the consequences of the decision on sub-events are perfectly known and uncertainty becomes probabilizable, whereas the plausibility of this event itself remains vague and the...

In this paper we present the notions of median useful for the aggregation of preferences and, more generally, in problems of consensus. After the introduction on the general notion of median, the first section studies the median relations of a profile of arbitrary or particular (tournaments,...

We prove for totally monotone games defined on the set of Borel sets of a locally compact sigma-compact topological space a similar decomposition theorem to the famous Yosida-Hewitt's one for finitely additive measures. This way any totally monotone decomposes into a continuous part and a...

The development of alternative investment has highlighted the limitations of standard performance measures like the Sharpe ratio, primarily because alternative strategies yield returns distributions which can be far from gaussian. In this paper, we propose a new framework in which trades,...

Public economics proposed various models that intend to determine the optimal provision of public goods based on individual preferences. To provide decision makers with empirical recommendations, economists thus need to elicit individual preferences, and more precisely the marginal rate of...

McKelvey and Page [1986] investigate the effect that common knowledge of an aggregate statistic of individuals' actions has on individual beliefs, assuming that public information can be expressed as a function of the individuals' posterior probabilities of some event. We show that this kind of...

This MATISSE Working Paper of the MSE of Paris 1 is taken from a report that the Author has written for the Commission on Human Rights of the United Nations (Geneva) and jointly presented by the Europe - Third World Centre and by the American Association of Jurists. It analyses the "good...

Static competitive equilibria in economies with incomplete markets are generically constrained suboptimal. Allocations induced by strategic equilibria of imperfectly competitive markets are also generically inefficient. In both cases, there is scope for Pareto-improving amendments. Considering...

We study the long run relationship between natural resources abundance and wealth of countries producing differentiated products sold in the international market. When the price (terms of trade) of national products depend on the human capital used to produce them, natural resources may lead to...