Results 101 to 110 of about 19,767 (209)

On Gamma-Gompertz-Makeham Assurances and Life Annuities

Austrian Journal of Statistics
We focus on the gamma-Gompertz-Makeham model, and derive useful structural properties for this mortality model. We provide the basic properties like moments, remaining life expectancy, single life annuity, among many others, in closed form, and so it ...
Fredy Castellares, Silvio Patricio, Artur Lemonte   +2 more
doaj   +1 more source

Bivariate Exponentaited Generalized Weibull-Gompertz Distribution

, 2015
In this paper, we introduce a bivariate exponentaited generalized Weibull-Gompertz distribution. The model introduced here is of Marshall-Olkin type. Several properties are studied such as bivariate probability density function and it is marginal, moments, maximum likelihood estimation, joint reversed (hazard) function and joint mean waiting time and ...
EL-Damcese, M. A., Mustafa, Abdelfattah, Eliwa, M. S.   +2 more
openaire   +2 more sources

Associations Between Polybrominated Diphenyl Ethers and Biological Aging in NHANES 2005–2010 and 2015–2016

GeoHealth, Volume 10, Issue 2, February 2026.
Abstract The associations of polybrominated diphenyl ethers (PBDEs) with biological aging are unclear. This study explores the possible relationship between PBDEs and accelerated aging. Cross‐sectional data from 6,091 subjects of the National Health and Nutrition Examination Survey (NHANES) 2005–2010 and 2015–2016 are analyzed.
Yan Chen, Ruilan Gong, Qianzhu Li, Xinrui Ma   +3 more
wiley   +1 more source

The Burr XII–Gompertz Distribution: A Competing Risks Model With Applications to Lifetime Data

Journal of Mathematics
In this article, we introduce a novel four-parameter lifetime distribution that is constructed by compounding the Burr XII and Gompertz models in a sequential system and is known as the Burr XII–Gompertz distribution.
Bahman Tarvirdizade, Salman Babayi
doaj   +1 more source

Skew-Reflected-Gompertz Information Quantifiers with Application to Sea Surface Temperature Records

Mathematics, 2019
The Skew-Reflected-Gompertz (SRG) distribution, introduced by Hosseinzadeh et al. (J. Comput. Appl. Math. (2019) 349, 132–141), produces two-piece asymmetric behavior of the Gompertz (GZ) distribution, which extends the positive to a whole dominion by an
Javier E. Contreras-Reyes, Mohsen Maleki, Daniel Devia Cortés   +2 more
doaj   +1 more source

Skyfall: A Survival Analysis of the IMF Executive Board Members

Kyklos, Volume 79, Issue 1, Page 232-250, February 2026.
ABSTRACT In the absence of a retirement age constraint at the IMF, this study explores the tenure persistence within the Board of Directors of the International Monetary Fund (IMF) from 2009 to 2021, through a survival analysis. The findings highlight that extrinsic factors, namely sovereign crises, banking crises, the ratio of debt‐to‐GDP, and ...
Elie Israël, Maqsood Aslam, Etienne Farvaque, Franck Malan   +3 more
wiley   +1 more source

Objective Posterior Analysis of kth Record Statistics in Gompertz Model

Axioms
The Gompertz distribution has proven highly valuable in modeling human mortality rates and assessing the impacts of catastrophic events, such as plagues, financial crashes, and famines.
Zoran Vidović, Liang Wang
doaj   +1 more source

On order statistics from the Gompertz–Makeham distribution and the Lambert W function

Mathematical Modelling and Analysis, 2013
The aim of this paper is twofold. First, we show that the expected value of the minimum order statistic from the Gompertz-Makeham distribution can be expressed in closed form in terms of the incomplete gamma function.
Pedro Jodra
doaj   +1 more source

Flow‐Dependent Inertial Permeability Defines Crossover Between Darcy and Forchheimer Flow Regimes

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract We present mechanistic evidence that the Forchheimer inertial permeability coefficient (β $\beta $) is flow‐dependent in the weak‐to‐intermediate inertia crossover regime, governed by pore‐scale eddy growth‐to‐confinement dynamics. In contrast to classical theory, β $\beta $ attains steady‐state (βs ${\beta }_{s}$) asymptotically in the ...
Kuldeep Singh, Negin Sharifabad
wiley   +1 more source

Early postnatal growth of the spotted dolphin, Stenella attenuata, in the offshore Eastern Tropical Pacific. [PDF]

, 1984
Estimates of length at birth and early postnatal growth are made for the northern and southern populations of the offshore spotted dolphin in the offshore eastern tropical Pacific.
Hammond, P.S., Hohn, Aleta A.
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