In this paper, we consider a natural procedure of decision-making, called a “Grouping Choice Method”, which leads to a kind of bounded rational choices. In this procedure a decision-maker (DM) first divides the set of available alternatives　into some groups and in each group she chooses...

The theory of fair allocation is often favourably contrasted with the social choice theory in the search for escape routes from Arrow's impossibility theorem. Its success is commonly attributed to the fact that it is modest in its goal vis-`a-vis social choice theory, since it does not aspire...

In a non-welfaristic framework, Sen (1993) extends the first fundamental welfare theorem by demonstrating that the market mechanism also promotes individual freedom efficiently. This paper has a two-fold purpose. First, in order to investigate extensions of the first and the second welfare...

We study the possibility of making social evaluations independently of individual preferences over non-consumed commodities. This is related to the well-known problem of performing international comparisons of standard of living across countries with different consumption goods. We prove...

In this paper, we consider a natural procedure of decision-making, called a “Grouping Choice Method”, which leads to a kind of bounded rational choices. In this procedure a decision-maker (DM) first divides the set of available alternatives into some groups and in each group she chooses the...

In two-sided matching problems, we consider “natural” changes in preferences of agents in which only the rankings of current partners are enhanced. We introduce two desirable properties of matching rules under such rank-enhancements of partners. One property requires that an agent who...

This paper considers two distinct procedures to lexicographically compose multiple criteria for social or individual decision making. The first procedure composes M binary relations into one, and then selects its maximal elements. The second procedure first selects the set of maximal elements of...