On the size of the class of bivariate extreme-value copulas with a fixed value of Spearman's rho or Kendall's tau
Journal of Mathematical Analysis and Applications(2019)
摘要
A bivariate extreme-value copula is characterized by a function of one variable, called a Pickands dependence function, which is convex and comprised between two bounds. The authors identify the smallest possible compact set containing the graph of all Pickands dependence functions whose corresponding bivariate extreme-value copula has a fixed value of Spearman's rho or Kendall's tau. The consequences of this result for statistical modeling are outlined.
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关键词
Extreme-value copula,Kendall's tau,Pickands dependence function,Spearman's rho
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