theorem and Fishburn's possibility theorem. The proof methodology is based on a model-theoretic approach to aggregation theory … aggregation theory ; variational preferences ; multiple priors preferences ; convex risk measure ; model theory ; first … there exist nondictatorial aggregation functions of convex risk measures satisfying Arrow-type rationality axioms (weak …

. -- Arrow-type preference aggregation ; judgment aggregation ; model theory ; first-order predicate logic ; filter ; ultrafilter …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 …

-theoretic approach to aggregation theory inspired by Lauwers and Van Liedekerke (J Math Econ 24(3):217-237, 1995). Diverse applications …. It addresses the question whether there exist non-dictatorial aggregation functions of convex risk measures satisfying … Arrow's impossibility theorem. For infinite electorates, the possibility of rational aggregation depends on an …

-utility preferences are given. A novel proof methodology for special aggregation problems, based on model theory (in the sense of …Cerreia-Vioglio, Ghirardato, Maccheroni, Marinacci and Siniscalchi (Economic Theory, 48:341-375, 2011) have recently …) preference orderings. This paper investigates the problem of Arrovian aggregation of such preferences - and proves dictatorial …

Cerreia-Vioglio, Ghirardato, Maccheroni, Marinacci and Siniscalchi (Economic Theory, 48:341-375, 2011) have recently … problem of Arrovian aggregation of MBA preferences - and prove dictatorial impossibility results for both finite and infinite …

This introduces the symposium on judgment aggregation. The theory of judgment ag­gregation asks how several individuals …­duction is to show how ideas from the familiar theory of preference aggregation can be extended to this more general case. We …

A new class of preference-aggregation rules is proposed, weak-veto rules. Weak-veto rules are applicable in settings …

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

literature on aggregation of fuzzy preferences. We restrict ourselves to “pure aggregation” theory and, accordingly, do not cover …Fuzzy set theory has been explicitly introduced to deal with vagueness and ambiguity. One can also use probability … theory or techniques borrowed from philosophical logic. In this chapter, we consider fuzzy preferences and we survey the …