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Risk aggregation and Extreme Events [57]

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Bullet points include: Normal (Pearson) correlation coefficient: Spearman’s rank correlation coefficient: Here qt and rt are ranks of xt and yt Kendall’s tau: Concordant: (xi > xj and yi > yj) or (xi < xj and yi < yj) Last two involve only ordering of observations, i.e. (for bivariate distributions) their copula and not their marginals Parameterisation of some copula families has one-to-one correspondence with one or other of these alternative ways of measuring co-dependency

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