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2015.015 Working Papers "Note di lavoro"

The Impact of Ambiguity Prudence on Insurance and Prevention

Authors: Loïc Berger

Series: Climate Change and Sustainable Development

Keywords: Non-expected Utility, Self-protection, Self-insurance, Ambiguity Prudence

JEL n.: D61, D81, D91, G11

Published in: Theory and Decision 08/2015 -> go to


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 simple theoretical framework, this paper derives plausible conditions under which ambiguity aversion raises the demand for (self-)insurance and self-protection. In particular, it is shown that in most usual situations where the level of ambiguity does not increase with the level of effort, a simple condition of ambiguity prudence known as decreasing absolute ambiguity aversion (DAAA) is sufficient to give a clear and positive answer to the question: Does ambiguity aversion raise the optimal level of effort?

Suggested citation: Berger, L., (2015), 'The Impact of Ambiguity Prudence on Insurance and Prevention', Theory and Decision, August 2015, http://rd.springer.com/article/10.1007%2Fs11238-015-9512-1#