Incremental Risk Vulnerability
We present a necessary and sufficient condition on an agent’s utility function for a simple mean preserving spread in an independent background risk to increase the agent’s risk aversion (incremental risk vulnerability). Gollier and Pratt (1996) have shown that declining and convex risk aversion as well as standard risk aversion are sufficient for risk vulnerability. We show that these conditions are also sufficient for incremental risk vulnerability. In addition, we present sufficient conditions for a restricted set of stochastic increases in an independent background risk to increase risk aversion.
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- Gollier, Christian & John W. PRATT, 1993. "Weak Proper Risk Aversion And The Tempering Effect of Background Risk," Working Papers 018, Risk and Insurance Archive.
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- Franke, Gunter & Stapleton, Richard C. & Subrahmanyam, Marti G., 1998. "Who Buys and Who Sells Options: The Role of Options in an Economy with Background Risk," Journal of Economic Theory, Elsevier, vol. 82(1), pages 89-109, September.
- Donald C. Keenan & Arthur Snow, 2003. "Locally Greater Vulnerability to Background Risk," The Geneva Risk and Insurance Review, Palgrave Macmillan, vol. 28(2), pages 161-172, December.
- Kihlstrom, Richard E & Romer, David & Williams, Steve, 1981. "Risk Aversion with Random Initial Wealth," Econometrica, Econometric Society, vol. 49(4), pages 911-20, June.
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