In the Edgeworth non-tatonnement process, trade occurs if there exists some coalition of agents able to make a Pareto-improving trade among themselves at current prices. It is known that the coalition size required is bounded by the number of commodities and that, provided all agents always have...

Recent papers have used household equivalence scales to construct measures of welfare inequality. Th is procedure rests on an often implicit value judgment, namely, that if, after adjustment for demographic characteristics, two households are on the same indifference curve, they are equally well...