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- W3092356142 abstract "Abstract This paper introduces a new family of bivariate copulas constructed using a unit Weibull distortion. Existing copulas play the role of the base or initial copulas that are transformed or distorted into a new family of copulas with additional parameters, allowing more flexibility and better fit to data. We present a general form for the new bivariate copula function and its conditional and density distributions. The tail behaviors are investigated and indicate the unit Weibull distortion may result in new copulas with upper tail dependence when the base copula has no upper tail dependence. The concordance ordering and Kendall’s tau are derived for the cases when the base copulas are Archimedean, such as the Clayton and Frank copulas. The Loss-ALEA data are analyzed to evaluate the performance of the proposed new families of copulas." @default.
- W3092356142 created "2020-10-15" @default.
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- W3092356142 date "2020-10-06" @default.
- W3092356142 modified "2023-10-16" @default.
- W3092356142 title "New families of bivariate copulas via unit weibull distortion" @default.
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- W3092356142 doi "https://doi.org/10.1186/s40488-020-00110-z" @default.
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