A Value at Risk Approach to Background Risk

Elisa Luciano and Robert Kast
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Robert Kast: [1] 2CNRS, GREQAM, 2 rue de la Charité, F13302 Marseille, e-mail: kast@ehess.cnrs-mrs.fr [2] 3ICER, Villa Gualino, Torino

The Geneva Risk and Insurance Review, 2001, vol. 26, issue 2, 115 pages

Abstract: This paper studies the effects of an uninsurable background risk (BR) on the demand for insurance (proportional and with deductible). We study both the case of BR uncorrelated with the insurable one and the perfectly correlated one, in a Gaussian world. In order to perform our study, we exploit the new risk measure known as Value at Risk (VaR) and consider insurance contracts which are Mean-VaR efficient. We obtain results which depend on the parameters (moments) of both risks and on the magnitude of loadings charged by the insurance company, instead of depending on the risk attitudes of the insured, such as risk aversion and prudence.We demonstrate that, if loadings are not too high, the demand for insurance increases with positively correlated BR; it decreases with BR negatively correlated if the latter is less risky than the insurable one (in this case it can even go to zero, if loadings are too high); it goes to zero with BR which is negatively correlated and more risky than the insurable one. The Geneva Papers on Risk and Insurance Theory (2001) 26, 91–115. doi:10.1023/A:1014303013248

Date: 2001
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