Results 31 to 40 of about 489 (106)

A link between Kendall’s τ, the length measure and the surface of bivariate copulas, and a consequence to copulas with self-similar support

open access: yesDependence Modeling, 2023
Working with shuffles, we establish a close link between Kendall’s τ\tau , the so-called length measure, and the surface area of bivariate copulas and derive some consequences.
Sánchez Juan Fernández   +1 more
doaj   +1 more source

Dependence of Stock Returns in Bull and Bear Markets

open access: yesDependence Modeling, 2013
Despite of its many shortcomings, Pearson’s rho is often used as an association measure for stock returns. A conditional version of Spearman’s rho is suggested as an alternative measure of association. This approach is purely nonparametric and avoids any
Dobric Jadran   +2 more
doaj   +1 more source

A topological proof of Sklar’s theorem in arbitrary dimensions

open access: yesDependence Modeling, 2022
Copulas are appealing tools in multivariate probability theory and statistics. Nevertheless, the transfer of this concept to infinite dimensions entails some nontrivial topological and functional analytic issues, making a deeper theoretical understanding
Benth Fred Espen   +2 more
doaj   +1 more source

A nonparametric test for comparing survival functions based on restricted distance correlation

open access: yesDependence Modeling, 2023
In this article, we propose an omnibus test for comparing two survival functions under non-proportional hazards. The test statistic is based on a product-limit estimate of the restricted distance correlation, which is closely related to the L2{L}_{2 ...
Zhang Qingyang
doaj   +1 more source

Inference for elliptical copula multivariate response regression models

open access: yesElectronic Journal of Statistics, 2019
The estimation of the coefficient matrix in a multivariate response linear regression model is considered in situations where we can observe only strictly increasing transformations of the continuous responses and covariates.
Yue Zhao, C. Genest
semanticscholar   +1 more source

Polynomial bivariate copulas of degree five: characterization and some particular inequalities

open access: yesDependence Modeling, 2021
Bivariate polynomial copulas of degree 5 (containing the family of Eyraud-Farlie-Gumbel-Morgenstern copulas) are in a one-to-one correspondence to certain real parameter triplets (a, b, c), i.e., to some set of polynomials in two variables of degree 1: p(
Šeliga Adam   +5 more
doaj   +1 more source

A general correlation inequality and the Almost Sure Local Limit Theorem for random sequences in the domain of attraction of a stable law [PDF]

open access: yes, 2013
In the present paper we obtain a new correlation inequality and use it for the purpose of extending the theory of the Almost Sure Local Limit Theorem to the case of lattice random sequences in the domain of attraction of a stable law.
Giuliano, Rita, Szewczak, Zbigniew S.
core   +2 more sources

Continuity of the maximum-entropy inference: Convex geometry and numerical ranges approach [PDF]

open access: yes, 2015
We study the continuity of an abstract generalization of the maximum-entropy inference - a maximizer. It is defined as a right-inverse of a linear map restricted to a convex body which uniquely maximizes on each fiber of the linear map a continuous ...
Arleta Szko La   +7 more
core   +1 more source

Copula Relations in Compound Poisson Processes [PDF]

open access: yes, 2014
We investigate in multidimensional compound Poisson processes (CPP) the relation between the dependence structure of the jump distribution and the dependence structure of the respective components of the CPP itself.
Palmes, Christian
core  

A Central Limit Theorem for non-overlapping return times

open access: yes, 2005
Define the non-overlapping return time of a random process to be the number of blocks that we wait before a particular block reappears. We prove a Central Limit Theorem based on these return times.
Johnson, Oliver
core   +1 more source

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