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191
Irrational exuberance and herding in financial markets
Boortz, Christopher
-
2016
In the context of a two-state, two-trader financial market herd model introduced by Avery and Zemsky (1998) we investigate how informational ambiguity in conjunction with waves of optimism and pessimism affect investor behavior, social learning and price dynamics. Without ambiguity, neither...
Persistent link: https://www.econbiz.de/10011452902
Saved in:
192
Ellsberg re-revisited : an experiment disentangling model uncertainty and risk aversion
Berger, Loic
;
Bosetti, Valentina
-
2016
The results of an experiment extending Ellsberg's setup demonstrate that attitudes towards ambiguity and compound uncertainty are closely related. However, this association is much stronger when the second layer of uncertainty is subjective than when it is objective. Provided that the compound...
Persistent link: https://www.econbiz.de/10011457763
Saved in:
193
Finding common ground when experts disagree : belief dominance over portfolios of alternatives
Baker, Erin
;
Bosetti, Valentina
;
Salo, Ahti A.
-
2016
We address the problem of choosing a portfolio of policies under "deep uncertainty." We introduce the idea of belief dominance as a way to derive a set of non-dominated portfolios and robust individual alternatives. Our approach departs from the tradition of providing a single recommended...
Persistent link: https://www.econbiz.de/10011504367
Saved in:
194
Collective risk-taking decisions with heterogeneous beliefs
Gollier, Christian
-
2003
Suppose that a group of agents having divergent expectations can share risks efficiently. We examine how this group should behave collectively to manage these risks. We show that the beliefs of the representative agent is in general a function of the group.s wealth level, or equivalently, that...
Persistent link: https://www.econbiz.de/10011507677
Saved in:
195
Dynamic consistent alpha-maxim expected utility
Beißner, Patrick
;
Lin, Qian
-
2015
We establish a class of fully nonlinear conditional expectations. Similarly to the usage of linear expectations when a probabilistic description of uncertainty is present, we observe analogue quantitative and qualitative properties. The type of nonlinearity captures the agents sentiments of...
Persistent link: https://www.econbiz.de/10010477162
Saved in:
196
Learning under ambiguity : a note on the belief dynamics of Epstein and Schneider (2007)
Heyen, Daniel
-
2014
Epstein and Schneider (2007) develop a framework of learning under ambiguity, generalizing maxmin preferences of Gilboa and Schmeidler (1989) to intertemporal settings. The specific belief dynamics in Epstein and Schneider (2007) rely on the rejection of initial priors that have become...
Persistent link: https://www.econbiz.de/10010424809
Saved in:
197
Informativeness of experiments for MEU : a recursive definition
Heyen, Daniel
;
Wiesenfarth, Boris Roland
-
2014
The well-known Blackwell's theorem states the equivalence of statistical informativeness and economic valuableness. Celen (2012) generalizes this theorem, which is well-known for subjective expected utility (SEU), to maxmin expected utility (MEU) preferences. We demonstrate that the underlying...
Persistent link: https://www.econbiz.de/10010424810
Saved in:
198
The impact of ambiguity prudence on insurance and prevention
Berger, Loïc
-
2015
Most decisions concerning (self-)insurance and self-protection have to be taken in situations in which a) the effort exerted precedes the moment uncertainty realises, and b) the probabilities of future states of the world are not perfectly known. By integrating these two characteristics in a...
Persistent link: https://www.econbiz.de/10010486991
Saved in:
199
When is ambiguity-attitude constant?
Eichberger, Jürgen
;
Grant, Simon
;
Kelsey, David
-
2012
This paper studies how updating affects ambiguity-attitude. In particular we focus on the generalized Bayesian update of the Jaffray-Phillipe sub-class of Choquet Expected Utility preferences. We find conditions for ambiguity-attitude to be the same before and after updating. A necessary and...
Persistent link: https://www.econbiz.de/10009514770
Saved in:
200
Allais for the poor
Herrmann, Tabea
;
Hübler, Olaf
;
Menkhoff, Lukas
; …
-
2016
ability”, such as poor education, unemployment, and little financial sophistication. Based on prospective reference
theory
, we …
Persistent link: https://www.econbiz.de/10011452571
Saved in:
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