two forms of ex-post decision making according to individual rationality: 1. ambiguity 2. uncertainty. An elaboration of …

Ambiguity refers to a decision situation under uncertainty when there is incomplete information about the likelihood of … ambiguity and ambiguity aversion. …

consistent with two prominent models of decision making under uncertainty: variational preferences and smooth ambiguity. The …

unique distribution. In this paper we study the optimal auction problem allowing for ambiguity about the distribution of … valuations. Agents may be ambiguity averse (modeled using the maxmin expected utility model of Gilboa and Schmeidler 1989.) When … the bidders face more ambiguity than the seller we show that (i) given any auction, the seller can always (weakly …

they know more about, even when their beliefs are held constant. (They are averse to "ambiguity", or uncertainty about … probability.) We review evidence, recent theoretical explanations, and applications of research on ambiguity and SEU. …

ambiguity induces a significant increase in the performance of men who choose to compete, while we observe no change for women …. Men also increase their willingness to enter competition in the presence of ambiguity. Overall, both effects contribute to … men winning the tournament significantly more often than women under uncertainty and ambiguity. These findings suggest …

ambiguity induces a significant increase in the performance of men who choose to compete, while we observe no change for women …. Men also increase their willingness to enter competition in the presence of ambiguity. Overall, both effects contribute to … men winning the tournament significantly more often than women under uncertainty and ambiguity. These findings suggest …

winners). We compare these two conditions with a control treatment with a known number of winners. We find that ambiguity … willingness to enter competition with uncertainty and ambiguity, but men react slightly more than women. Overall, both effects … contribute to men winning the tournament significantly more often than women under uncertainty and ambiguity. Hence, previous …

We show that ambiguity aversion increases the value of a statistical life as soon as the marginal utility of wealth is … higher if alive than dead. The intuition is that ambiguity aversion has a similar effect as an increase in the perceived … baseline mortality risk, and thus operates as the "dead anyway" effect. We suggest, however, that ambiguity aversion should …