A technology with increasing marginal costs produces indivisible units of service. Each agent wants at most one unit of service. We compare two natural mechanisms where users have free access to the technology. In one mechanism, Average Cost, each user pays the same average cost, in the other,...

We propose two new axioms of demand responsiveness for additive cost sharing with variable demands. Group Monotonicity requires that if a group of agents increase their demands, not all of them pay less. Solidarity says that if agent i demands more, j should not pay more if k pays less. We...

We consider bilateral matching problems where each person views those on the other side of the market as either acceptable or unacceptable: an acceptable mate is preferred to remaining single, and the latter to an unacceptable mate; all acceptable mates are welfare-wise identical. Using...

In this paper the existence of unemployment is partly explained as being the result of coordination failures. It is shown that as a result of self-fulfilling pessimistic expectations, even at Walrasian prices, a continuum of equilibria results, among which an equilibrium with approximately no...

In a model of exchange with price-taking individuals, the existence of a continuum of nontrivial underemployment equilibria with walrasian prices is proved for a generic set of economies. The likelihood of the occurrence of these equilibria is higher the

In this paper, the authors introduce consumption externalities as developed by K. Arrow in overlapping-generations economies. They show how the internalization of externalities--through exchanges at markets for externalities--may give rise to new phenomena such as altered stability properties...

When aggregating individual preferences through the majority rule in an n-dimensional spatial voting model, the `worst-case' scenario is a social choice configuration where no political equilibrium exists unless a super majority rate as high as 1-1/n is adopted. In this paper we assume that a...