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Title: An Axiomatization of Choquet Expected Utility with Cominimum Independence
Authors: Asano, Takao
Kojima, Hiroyuki
Keywords: Cominimum Additivity
Cominimum Independence
Choquet Expected Utility
Multi-prior Expected Utility
Core
E-Capacity Expected Utility
Issue Date: Sep-2013
Publisher: Institute of Economic Research, Kyoto University
Journal title: KIER Discussion Paper
Volume: 878
Abstract: This paper proposes a class of independence axioms for simple acts. By introducing the E-cominimum independence axiom that is stronger than the comonotonic independence axiom but weaker than the independence axiom, we provide a new axiomatization theorem of simple acts within the framework of Choquet Expected Utility. Furthermore, in order to provide the axiomatization of simple acts, we generalize Kajii, Kojima, and Ui (2007, Journal of Mathematical Economics) into an infinite state space. Our axiomatization theorem relates Choquet Expected Utility to Multi-prior Expected Utility through the core of a capacity that is explicitly derived within our framework. Our result in this paper also derives Gilboa (1989, Econometrica), Eichberger and Kelsey (1999, Theory and Decision), and Rohde (2010, Social Choice and Welfare) as a corollary.
URI: http://hdl.handle.net/2433/178766
Appears in Collections:KIER Discussion Paper (English)

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