Insurance demand in the presence of loss‐dependent background risk

Sebastian Hinck and Petra Steinorth

Journal of Risk & Insurance, 2023, vol. 90, issue 4, 991-1026

Abstract: We analyze insurance demand when insurable losses come with an uninsurable zero‐mean background risk that increases in the loss size. If the individual is risk vulnerable, loss‐dependent background risk triggers a precautionary insurance motive and increases optimal insurance demand. Prudence alone is sufficient for insurance demand to increase in two cases: the case of fair insurance and the case where the smallest possible loss exceeds a certain threshold value (referred to as the large loss case). We derive conditions under which insurance demand increases or decreases in initial wealth. In the large loss case, prudence determines whether changes in the background risk lead to more insurance demand. We generalize this result to arbitrary loss distributions and find conditions based on decreasing third‐degree Ross risk aversion, Arrow–Pratt risk aversion, and Arrow–Pratt temperance.

Date: 2023
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https://doi.org/10.1111/jori.12426

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Persistent link: https://EconPapers.repec.org/RePEc:bla:jrinsu:v:90:y:2023:i:4:p:991-1026

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