Testing whether risk professionals (here insurers) behave differently under risk and ambiguity when they cover catastrophic risks (floods and earthquakes) and non-catastrophic risks (fires), this paper reports the results of the first field experiment in the United States designed to distinguish...

In this paper, we build on the emerging literature on group decision-making to study the so-called ‘group shift’ effect, i.e., groups are less risk-averse than individuals. Our study complements past research in two ways. First, we study the group shift effect under two sources of...

We demonstrate how the standard usage of the random incentive system in ambiguity experiments is not incentive compatible if the decision maker is ambiguity averse. We propose a slight modification of the procedure in which the randomization takes place before decisions are made and the state is...

We often deal with uncertain events for which no probabilities are known. Several normative models have been proposed. Descriptive studies have usually been qualitative, or they estimated ambiguity aversion through one single number. This paper introduces the source method, a tractable method...

Machina (2009) introduced two examples that falsify Choquet expected utility, presently one of the most popular models of ambiguity. This article shows that Machina's examples falsify not only the model mentioned, but also four other popular models for ambiguity of the literature, namely maxmin...

Robert Axelrod's seminal round-robin computer tournaments for the repeated prisoner's dilemma have been hailed as the explanation of the evolution of cooperation. In this paper, Axelrod's results are systematically re-examined in the light of new insights about computer simulations. In...

In contrast to current literature which mainly identifies relationships between particular economic behaviours and specific attitudes suggestive of those behaviours, we explore the potential of general human values for explaining economic behaviour. In particular, we investigate whether...

This paper argues that migration could trigger institutional development in the sending country. It is shown that the existence of rent-seeking institutions not only hinders the adoption of a more efficient technology, it also reinforces itself; while the possibility of migrating to a more...