We use the framework of random matching games and develop a two society model to analyze the interaction of societies with different social norms. Each agent repeatedly faces two different coordination games. A social norm of a society is a mode of behavior - strategy - which is adopted by a...

The new welfare economics, both of the Kaldor-Hicks-Scitovsky-Samuelson school built on the compensation principles and the Bergson-Samuelson school built on the social welfare function, tried to expand the domain of applicability of the Pareto unanimity principle. The purpose of this paper is...

This paper reflects on consequentialism which underlies the traditional normative economics. It asserts that the informational basis of normative economics should be expanded so that the intrinsic value of social choice procedures should be properly taken into account along with the value of...

This paper looks at implementation in economic environments when agents have perfect information about the state of the world, but cannot commit not to renegotiate bad outcomes or to collude against each other. If renegotiation satisfies a weak condition of disagreement point monotonicity, then...

We analyze bankruptcy problems with an indivisible object, where real owners and outside traders want to allocate an indivisible object among them with monetary compensation. The object might be a company that has gone bankrupt or a house left by a parent who has died, and so on. We show that...

We study strategy-proof probabilistic mechanisms in a binary public decision model when monetary transfers are allowed. We consider not only the pivotal mechanism, the majority voting mechanism, the random serial dictatorship mechanism, and the unanimity mechanism, but also the random chair...

We consider the allocation problem of assigning heterogenous objects to a group of agents and determining how much they should pay. Each agent receives at most one object. Agents have non-quasi-linear preferences over bundles, each consisting of an object and a payment. Especially, we focus on...

We consider a problem of allocating multiple identical objects to a group of agents and collecting payments. Each agent may receive several objects and has quasi-linear preferences with a submodular valuation function. It is known thatWalrasian mechanisms are manipulable. We investigate the...

We consider the problem of fairly reallocating the individual endowments of a perfectly divisible good among agents with single-peaked preferences. We provide a new concept of fairness, called position-wise envy-freeness, that is compatible with individual rationality. This new concept requires...

We study the problem of choosing prize winners from among a group of experts when each expert nominates another expert for the prize. A nomination rule determines the set of winners on the basis of the profile of nominations; the rule is impartial if one's nomination never influences one's own...