Ambiguity refers to a decision situation under uncertainty when there is incomplete information about the likelihood of events. Different formal models of this notion have been developed with differing implications about the representation of ambiguity and ambiguity aversion.

This paper shows that, for CEU preferences, the axioms consquentialism, state independenceand conditional certainty equivalent consistency under updating characterise a family of capacities,called Genralised Neo-Additive Capacities (GNAC). This family contains as special casesamong others...

Least-Unmatched Price Auctions have become a popular format of TV and radio shows. Increasingly,they are also applied in internet trading. In these auctions the lowest single (unique)bid wins. We analyze the game-theoretic solution of least unmatched price auctions when prize,bidding cost and...

In this paper, we consider a decision-maker who tries to learn the distribution ofoutcomes from previously observed cases. For each observed sequence of casesthe decision-maker predicts a set of priors expressing his beliefs about the underlyingprobability distribution. We impose a version of...

We study the impact of ambiguity on two alternative institutions of nancial intermediationin an economy where consumers face uncertain liquidity needs. The ambiguitythe consumers experience is modeled by the degree of condence in their additive beliefs. Weanalyze the optimal liquidity allocation...

The concept of a non-extreme-outcome-additive capacity (neo-additive capacity ) is introduced.Neo-additive capacitiesmodel optimistic and pessimistic attitudes towards uncertaintyas observed in many experimental studies. Moreover, neo-additive capacities canbe applied easily in economic...

The regulation of vertical relationships between firms is the subject of persistent legal and academic controversy. The literature studying vertical trade relationships seems to assume that an upstream monopolist prefers downstream competition over exclusive distribution arrangements. We derive...

This paper analyzes the impact of capital adequacy regulation on bank insolvency and aggregate investment.

Credit risk models used in quantitative risk management treat credit risk analysis conceptually like a single person decision problem. From this perspective an exogenous source of risk drives the fundamental parameters of credit risk: probability of default, exposure at default and the recovery...

Goeree & Holt (2001) observe that, for some parameter values, Nash equilibrium providesgood predictions for actual behaviour in experiments. For other payoff parameters, however,actual behaviour deviates consistently from that predicted by Nash equilibria. They attributethe robust deviations...