Results 71 to 80 of about 42,928 (197)

Modelling the joint distribution of competing risks survival times using copula functions [PDF]

open access: yes, 2005
The problem of modelling the joint distribution of survival times in a competing risks model, using copula functions is considered. In order to evaluate this joint distribution and the related overall survival function, a system of non-linear ...
Dimitrova, D. S.   +2 more
core  

Modeling the Dependency Structure of Stock Index Returns using a Copula Function Approach [PDF]

open access: yes
In the present study we assess the dependency structure between stock indexes by econometrically estimating the empirical copula function and the parameters of various parametric copula functions.
Necula, Ciprian
core  

Risk aggregation with empirical margins: Latin hypercubes, empirical copulas, and convergence of sum distributions

open access: yes, 2015
This paper studies convergence properties of multivariate distributions constructed by endowing empirical margins with a copula. This setting includes Latin Hypercube Sampling with dependence, also known as the Iman--Conover method.
Mainik, Georg
core   +1 more source

Testing the symmetry of a dependence structure with a characteristic function

open access: yesDependence Modeling, 2018
This paper proposes competing procedures to the tests of symmetry for bivariate copulas of Genest, Nešlehová and Quessy (2012). To this end, the null hypothesis of symmetry is expressed in terms of the copula characteristic function that uniquely ...
Bahraoui Tarik   +2 more
doaj   +1 more source

Dose Correlation of Panax ginseng and Atractylodes macrocephala Koidz. Drug Pairs in the Chinese Medicine Prescription Based on the Copula Function. [PDF]

open access: yesEvid Based Complement Alternat Med, 2021
Lin W   +12 more
europepmc   +1 more source

RESEARCH ON DYNAMIC SYSTEM RELIABILITY MODEL OF HIGH DIMENSIONAL COPULA FUNCTION

open access: yesJixie qiangdu, 2022
Aiming at the dynamic mechanical system with multiple failure correlation, the copula function is used to describe the correlation of failure modes among units, and a reliability model of dynamic mechanical system with multiple failure correlations is ...
FENG Jun, LIU Wei, TAN Long, LI Yi
doaj  

Projection Estimates of Constrained Functional Parameters [PDF]

open access: yes
AMS classifications: 62G05; 62G07; 62G08; 62G20; 62G32;estimation;convex function;extreme value copula;Pickands dependence function;projection;shape constraint;support function;tangent ...
Fils-Villetard, A.   +2 more
core   +1 more source

Student copula method in rainfall distribution [PDF]

open access: yes, 2015
Copulas are tools for modelling dependence of several random variables. The term copula was first used in the work of Sklar (1959) and is derived from the latin word copulare, to connect or to join.
Sahrin, Sharainie, Yusof, Fadhilah
core  

Modelling cascading effects for systemic risk: Properties of the Freund copula

open access: yesDependence Modeling, 2019
We consider a dependent lifetime model for systemic risk, whose basic idea was for the first time presented by Freund. This model allows to model cascading effects of defaults for arbitrarily many economic agents.
Guzmics Sándor, Pflug Georg Ch.
doaj   +1 more source

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