ultraproduct of the reals with respect to the ultrafilter of decisive coalitions; this construction explicitly determines the …

impossibility results for free ultrafilters: The domain of an ultraproduct over a free ultrafilter extends the individual factor … preferences that it generalises. This is due to the fact that the typical judgment aggregation problem induces an ultrafilter on …, dictatorship then immediately follows from the principality of an ultrafilter on a finite set. This is not the case for an infinite …

-respecting, systematic judgment aggregation functions is established. The proof constructs an ultraproduct of profiles, viewed as … propositional structures, with respect to the ultrafilter of decisive coalitions. This representation theorem can be used to prove …

all symmetric equilibria of these voting games. Second, we show that ambiguity may drastically undermine McLennan's (1998 …) results on decision quality: unlike in the absence of ambiguity, the ex ante optimal symmetric strategy profile need not be an …

axiomatised preferences in the presence of ambiguity as Monotonic Bernoullian Archimedean (MBA) preferences. We investigate the …

Ryan (2019), given a closed and convex set of priors, ambiguity-averse voters would select a prior from this set in a …