Information Acquisition and Decisions under Risk and Ambiguity # 488
نویسندگان
چکیده
The working papers published in the Series constitute work in progress circulated to stimulate discussion and critical comments. Views expressed represent exclusively the authors' own opinions and do not necessarily refl ect those of the editors. Die Deutsche Bibliothek verzeichnet diese Publikation in der deutschen National-bibliografi e; detaillierte bibliografi sche Daten sind im Internet über: Abstract This paper experimentally investigates individual information acquisition and decisions in ambiguous situations in which the degree of ambiguity can endogenously and individually be decreased by the subjects. In particular, I analyze how risk aversion, ambiguity attitude and personality traits are related to an individual's information acquisition prior to a decision and to the decision itself based on this information. I focus on urn decisions and conduct treatments that consider the loss and gain domain separately and that vary the amount of available information and the probabilistic structure. I fi nd that risk and ambiguity aversion aff ect the information acquisition but are less infl uential for the decisions between two ambiguous urns according to several heuristics. In contrast, personality traits and an individual's primary decision type turn out to have an impact on both information acquisition and decisions. I observe that under this study's presentation format the refl ection eff ect is reversed for negative and positive payoff s in low probability treatments compared to corresponding results under a descriptive presentation format.
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