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Extremal dependence measure and extremogram: the regularly varying case

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Abstract

The dependence of large values in a stochastic process is an important topic in risk, insurance and finance. The idea of risk contagion is based on the idea of large value dependence. The Gaussian copula notoriously fails to capture this phenomenon. Two notions in a process or vector context which summarize extremal dependence in a function comparable to a correlation function are the extremal dependence measure (EDM) and the extremogram. We review these ideas and compare the two tools and end with a central limit theorem for a natural estimator of the EDM which allows drawing confidence bands comparable to those provided by Bartlett’s formula in a classical context of sample correlation functions.

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Correspondence to Martin Larsson.

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S. Resnick was partially supported by ARO Contract W911NF-07-1-0078 at Cornell University.

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Larsson, M., Resnick, S.I. Extremal dependence measure and extremogram: the regularly varying case. Extremes 15, 231–256 (2012). https://doi.org/10.1007/s10687-011-0135-9

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  • DOI: https://doi.org/10.1007/s10687-011-0135-9

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