Weather derivative risk measures for extreme events

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<title>Weather derivative risk measures for extreme events</title>
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<namePart>Erhardt, Robert J.</namePart>
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<namePart>Smith, Richard L.</namePart>
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<abstract displayLabel="Summary">We consider pricing weather derivatives for use as protection against weather extremes by using max-stable processes to estimate risk measures. These derivatives are not currently traded on any open markets, but their use could help some institutions manage weather risks from extreme events. The central challenge is to model the dependence of payments, which increases the risk of holding multiple weather derivatives. The method described utilizes results from spatial statistics and extreme value theory to first model extremes in the weather as a max-stable process, and then simulate payments for a general collection of weather derivatives. As the joint likelihood function for max-stable processes is unavailable, we use two approaches: The first is based on the composite likelihood, and the second is based on approximate Bayesian computing (ABC). Both capture the spatial dependence of payments. To incorporate parameter uncertainty into the pricing model, we use bootstrapping with the composite likelihood approach, while the ABC method naturally incorporates parameter uncertainty. We show that the additional risk from the spatial dependence of payments can be quite substantial, and that the methods discussed can compute standard actuarial risk measures in both a frequentist and Bayesian setting</abstract>
<note type="statement of responsibility">Robert J. Erhardt, Richard L. Smith</note>
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<topic>Modelos probabílisticos</topic>
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<topic>Teorema de Bayes</topic>
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<topic>Seguros multirriesgo</topic>
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<topic>Gerencia de riesgos</topic>
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<topic>Climatología</topic>
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<title>North American actuarial journal</title>
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<publisher>Schaumburg : Society of Actuaries, 1997-</publisher>
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<identifier type="issn">1092-0277</identifier>
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<text>01/09/2014 Tomo 18 Número 3 - 2014 , p. 379-393</text>
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