This paper is concerned with preference-aggregation rules satisfying desirable efficiency and solidarity requirements. We …

relation. For two alternatives and an odd number of agents, it follows from May’s Theorem that the majority aggregation rule is …

-respecting, systematic judgment aggregation functions is established. The proof constructs an ultraproduct of profiles, viewed as … other properties of such judgment aggregation functions, in particular sovereignty and monotonicity, as well as an … impossibility theorem for judgment aggregation in finite populations. As a corollary, Lauwers and Van Liedekerke's (1995 …

there exist nondictatorial aggregation functions of convex risk measures satisfying Arrow-type rationality axioms (weak …'s impossibility theorem for finite electorates. For infinite electorates, the possibility of rational aggregation depends on a uniform … theorem and Fishburn's possibility theorem. The proof methodology is based on a model-theoretic approach to aggregation theory …

It is well known that the literature on judgment aggregation inherits the impossibility results from the aggregation of … preferences that it generalises. This is due to the fact that the typical judgment aggregation problem induces an ultrafilter on … with free ultrafilters in the literature on aggregation problems is however, the arbitrariness of their selection combined …

]. The paper first proposes a unified framework for the analysis of the relation between various aggregation problems and the …-type preference aggregation ; Judgment aggregation ; Systematicity ; Model theory ; First-order predicate logic ; Filter ; Ultrafilter …

Judgment (or logical) aggregation theory is logically more powerful than social choice theory and has been put to use … aggregation theory developed by Dokow and Holzman (2010c). This application involves aggregating classifications (specifically … aggregation theory to a more general one …

We provide possibility results on the aggregation of beliefs and tastes for Monotone, Bernoullian and Archimedian … a prior to allow non dictatorial aggregation. A further weakening of this axiom on common-taste acts, where cardinal … the aggregation of ambiguity attitudes …

) preference orderings. This paper investigates the problem of Arrovian aggregation of such preferences - and proves dictatorial …-utility preferences are given. A novel proof methodology for special aggregation problems, based on model theory (in the sense of …