Results 11 to 20 of about 238,817 (214)

Nested Archimedean Copulas Meet R: The nacopula Package [PDF]

open access: yesJournal of Statistical Software, 2011
The package nacopula provides procedures for constructing nested Archimedean copulas in any dimensions and with any kind of nesting structure, generating vectors of random variates from the constructed objects, computing function values and probabilities
Marius Hofert, Martin Maechler
doaj   +1 more source

Stability versus neuronal specialization for STDP: long-tail weight distributions solve the dilemma. [PDF]

open access: yesPLoS ONE, 2011
Spike-timing-dependent plasticity (STDP) modifies the weight (or strength) of synaptic connections between neurons and is considered to be crucial for generating network structure. It has been observed in physiology that, in addition to spike timing, the
Matthieu Gilson, Tomoki Fukai
doaj   +1 more source

Nonparametric Estimation of the Tail-Dependence Coefficient

open access: yesRevstat Statistical Journal, 2013
A common measure of tail dependence is the so-called tail-dependence coefficient. We present a nonparametric estimator of the tail-dependence coefficient and prove its strong consistency and asymptotic normality in the case of known marginal ...
Marta Ferreira
doaj   +1 more source

A method of moments estimator of tail dependence [PDF]

open access: yes, 2007
In the world of multivariate extremes, estimation of the dependence structure still presents a challenge and an interesting problem. A procedure for the bivariate case is presented that opens the road to a similar way of handling the problem in a truly ...
Andrea Krajina   +5 more
core   +7 more sources

Dense classes of multivariate extreme value distributions [PDF]

open access: yes, 2013
International audienceIn this paper, we explore tail dependence modelling in multivariate extreme value distributions. The measure of dependence chosen is the scale function, which allows combinations of distributions in a very flexible way.
Fougères, Anne-Laure   +2 more
core   +2 more sources

Extremal attractors of Liouville copulas [PDF]

open access: yes, 2017
Liouville copulas, which were introduced in McNeil and Neslehova (2010), are asymmetric generalizations of the ubiquitous Archimedean copula class. They are the dependence structures of scale mixtures of Dirichlet distributions, also called Liouville ...
Belzile, Léo R.   +1 more
core   +2 more sources

The realization problem for tail correlation functions [PDF]

open access: yes, 2016
For a stochastic process $\{X_t\}_{t \in T}$ with identical one-dimensional margins and upper endpoint $\tau_{\text{up}}$ its tail correlation function (TCF) is defined through $\chi^{(X)}(s,t) = \lim_{\tau \to \tau_{\text{up}}} P(X_s > \tau \,\mid\, X_t
Fiebig, Ulf-Rainer   +2 more
core   +3 more sources

Max-stable random sup-measures with comonotonic tail dependence [PDF]

open access: yes, 2016
Several objects in the Extremes literature are special instances of max-stable random sup-measures. This perspective opens connections to the theory of random sets and the theory of risk measures and makes it possible to extend corresponding notions and ...
Molchanov, Ilya, Strokorb, Kirstin
core   +4 more sources

Statistical Modeling of Spatial Extremes [PDF]

open access: yes, 2012
The areal modeling of the extremes of a natural process such as rainfall or temperature is important in environmental statistics; for example, understanding extreme areal rainfall is crucial in flood protection.
Davison, A. C.   +2 more
core   +7 more sources

A large deviations approach to limit theory for heavy-tailed time series [PDF]

open access: yes, 2015
In this paper we propagate a large deviations approach for proving limit theory for (generally) multivariate time series with heavy tails. We make this notion precise by introducing regularly varying time series.
Mikosch, T., Wintenberger, O.
core   +2 more sources

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