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...

Patients needing kidney transplants may have willing donors who cannot donate to them because of blood or tissue incompatibility. Incompatible patient-donor pairs can exchange donor kidneys with other such pairs. The situation facing such pairs resembles models of the “double coincidence of...

Many markets have “unraveled” and experienced transactions at dispersed and apparently inefficiently early times. Often these markets develop institutions to coordinate and delay the timing of transactions. However it has proved difficult to gather data that allows the efficiency gains to be...