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- W3125213206 abstract "We discuss the connection between information and copula theories by showing that a copula can be employed to decompose the information content of a multivariate distribution into marginal and dependence components, with the latter quantified by the mutual information. We define the information excess as a measure of deviation from a maximum entropy distribution. The idea of marginal invariant dependence measures is also discussed and used to show that empirical linear correlation underestimates the amplitude of the actual correlation in the case of non-Gaussian marginals. The mutual information is shown to provide an upper bound for the asymptotic empirical log-likelihood of a copula. An analytical expression for the information excess of T-copulas is provided, allowing for simple model identification within this family. We illustrate the framework in a financial data set." @default.
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- W3125213206 date "2009-11-01" @default.
- W3125213206 modified "2023-09-26" @default.
- W3125213206 title "An information theoretic approach to statistical dependence: copula information" @default.
- W3125213206 hasPublicationYear "2009" @default.
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