Results 101 to 110 of about 286,227 (342)

Nonlinear Log-Periodogram Regression for Perturbed Fractional Processes [PDF]

open access: yes
This paper studies fractional processes that may be perturbed by weakly dependent time series. The model for a perturbed fractional process has a components framework in which there may be components of both long and short memory.
Peter C.B. Phillips, Yixiao Sun
core  

An assessment of three variance estimators for the k-nearest neighbour technique

open access: yesSilva Fennica, 2013
A jackknife (JK), a bootstrap (BOOT), and an empirical difference estimator (EDE) of totals and variance were assessed in simulated sampling from three artificial but realistic complex multivariate populations (N = 8000 elements) organized in ...
Magnussen, Steen
doaj   +1 more source

An integrative shrinkage estimator for random-effects meta-analysis of rare binary events

open access: yesContemporary Clinical Trials Communications, 2018
Meta-analysis has been a powerful tool for inferring the treatment effect between two experimental conditions from multiple studies of rare binary events. Recently, under a random-effects (RE) model, Bhaumik et al.
Lie Li, Ou Bai, Xinlei Wang
doaj  

Reducing Bias in Beta Regression Models Using Jackknifed Liu-Type Estimators: Applications to Chemical Data

open access: yesJournal of Mathematics
In the field of chemical data modeling, it is common to encounter response variables that are constrained to the interval (0, 1). In such cases, the beta regression model is often a more suitable choice for modeling.
Solmaz Seifollahi   +2 more
doaj   +1 more source

Discontinuation of Immunotherapy in Patients With Relapsing Myelitis Without AQP4/MOG Antibodies

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT This study assesses the outcomes of immunotherapy discontinuation in patients with relapsing seronegative idiopathic myelitis (SIM), a condition that remains uninvestigated due to its rarity. We reviewed records from 77 patients with relapsing SIM at the National Cancer Center of Korea, focusing on 11 who discontinued treatment after a median ...
Ki Hoon Kim   +4 more
wiley   +1 more source

Generalized Exponential Type Estimator for Population Variance in Survey Sampling

open access: yesRevista Colombiana de Estadística, 2014
In this paper, generalized exponential-type estimator has been proposed for estimating the population variance using mean auxiliary variable in single-phase sampling. Some special cases of the proposed generalized estimator have also been discussed.
AMBER ASGHAR   +2 more
doaj   +1 more source

Coffee Consumption Is Associated With Later Age‐at‐Onset of Parkinson's Disease

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Observation studies suggest that coffee consumption may lower the risk and delay the age‐at‐onset (AAO) of Parkinson's disease (PD). The aim of this study was to explore the causal relationship and genetic association between coffee consumption and the AAO, risk, and progression of PD. Using Mendelian randomization, we identified a significant
Dariia Kuzovenkova   +3 more
wiley   +1 more source

Bootstrap bias-correction procedure in estimating long-run relationships from dynamic panels, with an application to money demand in the euro area [PDF]

open access: yes
In dynamic panel data models, which are particularly well-suited to cross-country analysis, the Mean Group estimator (Pesaran and Smith, 1995) is under certain quite strong conditions consistent, but theoretical and empirical evidence indicates that it ...
Dario Focarelli
core  

Boundary Bias Correction Using Weighting Method in Presence of Nonresponse in Two-Stage Cluster Sampling

open access: yesJournal of Probability and Statistics, 2019
Kernel density estimators due to boundary effects are often not consistent when estimating a density near a finite endpoint of the support of the density to be estimated.
Nelson Kiprono Bii   +2 more
doaj   +1 more source

Probability-Sampling Approach to Editing

open access: yesAustrian Journal of Statistics, 2016
Editing for measurement errors is always part of data processing. In traditional editing, all data records are checked for errors and inconsistencies. In a new way of editing, only the subset with the most important erroneous responses is considered for ...
Maiki Ilves, Thomas Laitila
doaj   +1 more source

Home - About - Disclaimer - Privacy