In several applications the information is naturally represented by graphs. Traditional approaches cope with graphical data structures using a preprocessing phase which transforms the graphs into aâ€¦ (More)

In the standard arrovian framework and under the assumptions that individual preferences and social outcomes are linear orders over the set of alternatives, we provide necessary and sufficientâ€¦ (More)

We present a method which associates with any network a binary relation on its vertices which is complete and quasi-transitive, so that it admits at least a maximum. Such a method, called flowâ€¦ (More)

Let Î“ be a Borel probability measure on R and (T, C, Q) a nonatomic probability space. Define H = {H âˆˆ C : Q(H) > 0}. In some economic models, the following condition is requested. There are aâ€¦ (More)

The main purpose of the paper is to show that the process of household formation in a competitive market does not necessarily lead to outcomes that are efficient at the economy level, even assumingâ€¦ (More)