Individuals exhibit a randomization preference if they prefer random mixtures of two bets to each of the involved bets. Such preferences provide the foundation of various models of uncertainty aversion. However, it has to our knowledge not been empirically investigated whether uncertainty-averse...

This thesis deals with decision making under ambiguity. Ambiguity refers to situations in which probabilities for uncertain events are partially known. Ambiguitysensitive behavior, as manifested in Ellsberg-type experiments, is today a widely studied phenomenon, then, first of all, there is an...

Individuals exhibit a randomization preference if they prefer random mix-tures of two bets to each of the involved bets. Such preferences provide thefoundation of various models of uncertainty aversion. However, it has to ourknowledge not been empirically investigated whether uncertainty-averse...

In this paper, we study choice under growing awareness in the wake of new discoveries. The decision maker's behavior is described by two preference relations, one before and one after new discoveries are made. The original preference admits a subjective expected utility representation. As...