The purpose of this paper is to examine the possibility of a social choice rule to implement a social policy for ìsecuring basic well-being for all.î The paper introduces a new scheme of social choice, called a social relation function (SRF), which associates a reáexive and transitive binary...

In a market with indivisibilities, Roth and Postlewaite (1977) show that the (weak) core can suffer from instability problems, in the sense that groups of individuals might upset the equilibrium by recontracting among themselves. By contrast, the strong core is stable. Following the seminal...