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...

This paper studies the normative problem of redistribution between agents who can infuence their survival probability through private health spending, but who differ in their attitude towards the risks involved in the lotteries of life to be chosen. For that purpose, a two-period model is...

We investigate an extension of Dekel, Ely and Yilankaya's (2004) treatment of the evolution of preference to more general, possibly non-expected utility preferences. Along the lines of their analysis we consider a population of types that is repeatedly and randomly matched to play the mixed...

We investigate an extension of Dekel, Ely and Yilankaya's (2004) treatment of the evolution of preference to more general, possibly non-expected utility preferences. Along the lines of their analysis we consider a population of types that is repeatedly and randomly matched to play the mixed...

We investigate an extension of Dekel, Ely and Yilankaya's (2004) treatment of the evolution of preference to more general, possibly nonexpected utility preferences. Along the lines of their analysis we consider a population of types that is repeatedly and randomly matched to play the mixed...

We present a definition of increasing uncertainty, independent of any notion of subjective probabilities, or of any particular model of preferences.Our notion of an elementary increase in the uncertainty of any act corresponds to the addition of an 'elementary bet' which increases consumption by...