A note on ‘Re‐examining the law of iterated expectations for Choquet decision makers’

A note on ‘Re‐examining the law of iterated expectations for Choquet decision makers’

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Article ID: iaor2013614
Volume: 74
Issue: 3
Start Page Number: 439
End Page Number: 445
Publication Date: Mar 2013
Journal: Theory and Decision
Authors: ,
Keywords: Choquet integral
Abstract:

This note completes the main result of Zimper (Theory and decision, doi: ‐‐‐ 10.1007/s11238‐010‐9221‐8" TargetType="DOI"/> , 2010), by showing that additional conditions are needed in order the law of iterated expectations to hold true for Choquet decision makers. Due to the comonotonic additivity of Choquet expectations, the equation E[f, ν(dω)] = E[E[f(ω i, j ), ν(A i, j |A i )], ν(A i )], is valid only when the act f is comonotonic with its dynamic form, that we name ‘conditional certainty equivalent act’.

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