Kazuhiko Hashimoto

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In this paper, we consider a relationship between equity and efficiency in queueing problems. We show that under strategy-proofness, anonymity in welfare implies queue-efficiency. Furthermore, we also give a characterization of the equally distributed pairwise pivotal rule, as the only rule that satisfies strategy-proofness, anonymity in welfare and(More)
In this paper we prove that in pure exchange economies with two agents and a finite number of goods, a social choice function on the Cobb-Douglas preference domain is strategy-proof and Pareto-efficient if and only if it is dictatorial. Indeed, we can establish substantially stronger results that are the impossibilities on any arbitrarily small(More)
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