In this paper, we introduce the notion of a linked domain and prove that a non-manipulable social choice function defined on such a domain must be dictatorial.

At arbitrary prices of commodities and assets, fix-price equilibria exist under weak assumptions: endowments need not satisfy an interiority condition, utility functions need only satisfy very weak monotonicity requirement, and the asset return matrix allows for redundant assets. Prices of...

A partly heuristic attempt at exploring long-run policies aimed at a second-best compromis between ex ante risk-sharing efficiency and ex post productive efficiency. Wage subsidies for low-skilled workers financed vy taxes on high wages are advocated, together with imposed risk sharing between...

The main topic of this paper is a study of the lattice L. It is shown thatan integer basis of L can be obtained by taking the Kronecker product of vectors from integer bases of two much smaller lattices. Furthermore the resulting basis is a reduced basis if the integer bases of the two small...

We introduce a simple measure of risk aversion in the large. Besides satisfying properties which are conceptually analogous to the usual properties of the Arrow-Pratt measure, the index of risk aversion in the large leads to a stronger concept of decreasing risk aversion, which necessarily imp...

We study a family of unbounded polyhedra arising in the study of uncapacitated lot-sizing problems with Wagner-Whitin costs. With n the number of periods, we completely characterize the bounded faces of maximal dimension, and derice an O(n^2) alogorithm to express within the polyhedron as a...

This paper extends the Atkinson-Stiglitz model of direct and indirect taxation to a dynamic setting with two unobservable characteristics: productive ability and inherited wealth.Bequests are motivated by the "joy of giving".