Rational choice theory enjoys unprecedented popularity and influence in the behavioral and
social sciences, but it generates intractable problems when applied to socially interactive …

We review recent advances in the field of decision making under uncertainty or ambiguity.
We start with a presentation of the general approach to a decision problem under …

This paper studies n-player games where players' beliefs about their opponents' behaviour
are modelled as non-additive probabilities. The concept of an “equilibrium under …

Abstract Ellsberg's (1961) famous paradox shows that decision-makers give events with
'known'probabilities a higher weight in their outcome evaluation. In the same article, Ellsberg …

This paper raises the problem of how to define revealed probabilistic beliefs in the context of
the capacity/Choquet Expected Utility model. At the center of the analysis is a decision …

Nonadditive expected utility models were developed for explaining preferences in settings
where probabilities cannot be assigned to events. In the absence of probabilities, difficulties …

This article considers the impact of ambiguity in strategic situations. It extends the existing
literature on games with ambiguity‐averse players by allowing for optimistic responses to …

We report on an experiment in which subjects choose actions in strategic games with either
strategic complements or substitutes against a granny, a game theorist or other subjects …

Many weaknesses of game theory are cured by new models that embody simple cognitive
principles, while maintaining the formalism and generality that makes game theory useful …

Where behavior defies economic analysis, one explanation is that individuals consider more
than the immediate payoff. We present evidence that noneconomic factors influence …