Results 11 to 20 of about 4,395,518 (296)

A Spatiotemporal Analysis of the COVID‐19 Pandemic in North Africa

open access: yesGeoHealth, 2022
Spatial panel‐data models are estimated to identify the factors of the prevalence of the coronavirus outbreak in North Africa. Using daily data on the number of cases collected between March 2020 and December 2021, three types of general models are ...
Sami Khedhiri
doaj   +1 more source

Pro forma modeling of cryptocurrency returns, volatilities, linkages and portfolio characteristics

open access: yesChina Accounting and Finance Review, 2023
Critics say cryptocurrencies are hard to predict and lack both economic value and accounting standards, while supporters argue they are revolutionary financial technology and a new asset class.
Rama K. Malladi
doaj   +1 more source

Bayesian Exponential Random Graph Models with Nodal Random Effects [PDF]

open access: yes, 2015
We extend the well-known and widely used Exponential Random Graph Model (ERGM) by including nodal random effects to compensate for heterogeneity in the nodes of a network.
A. Caimo   +43 more
core   +3 more sources

Resonant effects in random dielectric structures [PDF]

open access: yes, 2013
Recently, a theory for artificial magnetism in two-dimensional photonic crystals has been developed for large wavelength using homogenization techniques.
Bouchitte, Guy   +2 more
core   +4 more sources

Modelling the distribution of health related quality of life of advancedmelanoma patients in a longitudinal multi-centre clinical trial using M-quantile random effects regression [PDF]

open access: yes, 2018
Health-related quality of life assessment is important in the clinical evaluation of patients with metastatic disease that may offer useful information in understanding the clinical effectiveness of a treatment.
Bianco, Paola Del   +4 more
core   +2 more sources

A New Zero-Inflated Negative Binomial Multilevel Model for Forecasting the Demand of Disaster Relief Supplies in the State of Sao Paulo, Brazil

open access: yesMathematics, 2022
This article presents the results of the implementation of a forecasting model, to predict the relief materials needed for assisting in decisions prior to natural disasters, thus filling a gap in the exploration of Generalized Linear Mixed Models (GLMM ...
Camila Pareja Yale   +2 more
doaj   +1 more source

Regional Business Confidence as Early Indicator of Regional Economic Growth

open access: yesManaging Global Transitions, 2021
Official sub-national GDP figures in South Africa are usually published with long delays or not at all, i.e. relevant, reliable, and real-time economic data on a provincial and local (municipal) level are often non-existent, causing a significant data ...
Ewert Kleynhans, Clive Coetzee
doaj   +2 more sources

Misspecification in Generalized Linear Mixed Models and Its Impact on the Statistical Wald Test

open access: yesApplied Sciences, 2023
Generalized linear mixed models are commonly used in repeated measurement studies and account for the dependence between observations obtained from the same experimental unit.
Diana Arango-Botero   +2 more
doaj   +1 more source

Extension of Nakagawa & Schielzeth's R2GLMM to random slopes models [PDF]

open access: yes, 2014
1.Nakagawa & Schielzeth extended the widely used goodness-of-fit statistic R2 to apply to generalized linear mixed models (GLMMs). However, their R2GLMM method is restricted to models with the simplest random effects structure, known as random ...
Johnson, Paul C.D.
core   +2 more sources

Statistical Inference of Wiener Constant-Stress Accelerated Degradation Model with Random Effects

open access: yesMathematics, 2022
In the field of reliability analysis, the constant-stress accelerated degradation test is one of the most commonly used methods to evaluate a product’s reliability as degradation data are provided. In this paper, a constant-stress accelerated degradation
Peihua Jiang
doaj   +1 more source

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