Results 91 to 100 of about 148 (142)

A bivariate Lévy process with negative binomial and gamma marginals

open access: yes
The joint distribution of X and N, where N has a geometric distribution and X is the sum of N IID exponential variables (independent of N), is infinitely divisible.
Kozubowski, Tomasz J.   +2 more
core  

Estimation of the precision matrix of multivariate Kotz type model

open access: yes
In this paper, the problem of estimating the precision matrix of a multivariate Kotz type model is considered. First, using the quadratic loss function, we prove that the unbiased estimator , where denotes the sample sum of product matrix, is dominated ...
Gupta, Arjun K., Sarr, Amadou
core  

Estimation of the precision matrix of a singular Wishart distribution and its application in high-dimensional data

open access: yes
In this article, the Stein-Haff identity is established for a singular Wishart distribution with a positive definite mean matrix but with the dimension larger than the degrees of freedom.
Srivastava, Muni S., Kubokawa, Tatsuya
core  

A case study for Kuwait mortality during the consequent waves of COVID-19. [PDF]

open access: yesHeliyon
BuHamra SS   +4 more
europepmc   +1 more source

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