Autori: Marinacci, Massimo , Siniscalchi, Marciano , Maccheroni, Fabio , Ghirardato, Paolo
Titolo: A subjective spin on roulette wheels
Periodico: International Center for Economics Research, Torino. ICER - Working papers series
Anno: 2001 - Fascicolo: 17 - Pagina iniziale: 1 - Pagina finale: 26

We provide a behavioral foundation to the notion of 'mixture' of acts, which is used to great advantage in the decision setting introduced by Anscombe and Aumann [1]. Our contruction allows one to formulate mixture-space axioms even in a fully sub jective setting, without assuming the existence of randomizing devices. This simplifies the task of developing axiomatic models which only use behavioral data. moreover, it is immune from the difficulty that agents may 'distort' the probabilities associated with randomizing devices. For illustration, we present simple subjective axiomatizations of some models of choice under uncertainty, including the maxmin expected utility model of Gilboa and Schmeidler [11], and Bewley's model of choice with incomplete preferences [2].


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