Although much of the theoretical literature on ambiguity works under the assumption of uncertainty aversion …

The α-MEU model and the smooth ambiguity model are two popular models in decision making under ambiguity. However, the …

In this paper, we establish an axiomatically founded generalized recursive smooth ambiguity model that allows for a … separation among intertemporal substitution, risk aversion, and ambiguity aversion. We axiomatize this model using two approaches … Seo (2009). We characterize risk attitude and ambiguity attitude within these two approaches. We then discuss our model …

ambiguity averse relation. First, we define two notions of more ambiguous with respect to such a class. A more ambiguous (I) act … makes an ambiguity averse decision maker (DM) worse off but does not affect the welfare of an ambiguity neutral DM. A more … ambiguous (II) act adversely affects a more ambiguity averse DM more, as measured by the compensation they require to switch …

between the set of relevant measures, shown by KMS [21] to reflect only perceived ambiguity, and the set of measures (which we … perceived ambiguity. Regarding symmetry assumptions, we show that, under relatively mild conditions, a variety of preference … stringent. Only when it is satisfied may the Bewley set be interpreted as reflecting only perceived ambiguity and not also taste …

This paper introduces changes in the level of ambiguity as a complementary source of time-varying risk aversion. We … ambiguity raises investors' risk aversion. The effect is quantified in an application to European sovereign debt markets using a … structural VAR to achieve identification in the data. We proxy for ambiguity using a measure of macroeconomic uncertainty and …

of beliefs (or ambiguity), imprecision of tastes (or multi-utility), and state dependence of utility. Examples include … phenomena, as well as state-dependent multi-utility generalisations of popular ambiguity models …

information structures; complete separations of attitudes toward risk and ambiguity; and new classes of preferences that allow … decreasing relative ambiguity aversion and thereby rationalize recent challenges to many of the extant multiple prior models of … ambiguity aversion. We also characterize a property of sets of priors, descriptive completeness, that resolves several open …