We analyze an economy with asymmetric information and endogenize the possibilities for information transmission between members of a coalition. We then define a concept of the Core that takes into account these communication possibilities. The internal consistency of the improvements is...

Using only ordinal axioms, we characterize several multigroup school segregationindices: the Atkinson Indices for the class of school districts with a given fixed numberof ethnic groups and the Mutual Information Index for the class of all districts.Properties of other school segregation indices...

This paper gives an axiomatic characterization of the Atkinson indices of segregationfor the multigroup case using a small number of purely ordinal axioms. We showthat the symmetric Atkinson index represents the unique ordering that treats ethnicgroups symmetrically, that is invariant to...