Results 121 to 130 of about 286,227 (342)

Bias Correction in Multiple Systems Estimation

Journal of Official Statistics
If part of a population is hidden but two or more samples are available that each cover parts of this population, multiple systems estimation can be applied to estimate the size of this population. A problem is that these estimates suffer from finite-sample bias that can be substantial in case of a small sample or a small population size. This problem
Daan B. Zult, Peter G. M. van der Heijden, Bart F. M. Bakker   +2 more
openaire   +4 more sources

The Bias of the RSR Estimator and the Accuracy of Some Alternatives [PDF]

, 2001
Liang Peng, William N. Goetzmann
openalex   +1 more source

Genetic Diversity and Expanded Phenotypes in Dystonia: Insights From Large‐Scale Exome Sequencing

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Dystonia is one of the most prevalent movement disorders, characterized by significant clinical and etiological heterogeneity. Despite considerable heritability (~25%), the etiology in most patients remains elusive. Moreover, understanding correlations between clinical manifestations and genetic variants has become increasingly ...
Mirja Thomsen, Fabian Ott, Sebastian Loens, Gamze Kilic‐Berkmen, Ai Huey Tan, Shen‐Yang Lim, Ebba Lohmann, Kaja M. Schröder, Lea Ipsen, Lena A. Nothacker, Linn Welzel, Alexandra S. Rudnik, Frauke Hinrichs, Thorsten Odorfer, Kirsten E. Zeuner, Friederike Schumann, Andrea A. Kühn, Simone Zittel, Marius Moeller, Robert Pfister, Christoph Kamm, Anthony E. Lang, Yi Wen Tay, Ana Luísa de Almeida Marcelino, Marie Vidailhet, Emmanuel Roze, Joel S. Perlmutter, Jeanne S. Feuerstein, Victor S. C. Fung, Florence Chang, Richard L. Barbano, Steven Bellows, Aparna A. Wagle Shukla, Alberto J. Espay, Mark S. LeDoux, Brian D. Berman, Stephen Reich, Andres Deik, Andre Franke, Michael Wittig, Sören Franzenburg, Jens Volkmann, Norbert Brüggemann, H. A. Jinnah, Tobias Bäumer, Christine Klein, Hauke Busch, Katja Lohmann   +47 more
wiley   +1 more source

Efficient GMM Estimation of Dynamic Panel Data Models Where Large Heterogeneity May Be Present [PDF]

This paper addresses the many instruments problem, i.e. (1) the trade-off between the bias and the efficiency of the GMM estimator, and (2) inaccuracy of inference, in dynamic panel data models where unobservable heterogeneity may be large.
Kazuhiko Hayakawa
core  

Estimation of the Population Total using the Generalized Difference Estimator and Wilcoxon Ranks

Revista Colombiana de Estadística, 2009
This paper presents a new regression estimator for the total of a population created by means of the minimization of a measure of dispersion and the use of the Wilcoxon scores.
HUGO ANDRÉS GUTIÉRREZ, F. JAY BREIDT
doaj  

Methodological biases in observational hospital studies of COVID-19 treatment effectiveness: pitfalls and potential

Frontiers in Medicine
IntroductionThis study aims to discuss and assess the impact of three prevalent methodological biases: competing risks, immortal-time bias, and confounding bias in real-world observational studies evaluating treatment effectiveness.
Oksana Martinuka, Derek Hazard, Hamid Reza Marateb, Hamid Reza Marateb, Marjan Mansourian, Marjan Mansourian, Miguel Ángel Mañanas, Miguel Ángel Mañanas, Sergio Romero, Sergio Romero, Manuel Rubio-Rivas, Martin Wolkewitz   +11 more
doaj   +1 more source

Reply to Letter: Real‐World Clinical Experience With Serum MOG and AQP4 Antibody Testing by Live Versus Fixed Cell‐Based Assay

Annals of Clinical and Translational Neurology, EarlyView.
Yana Said, Conlan Tran, LuAnn Rezavi, Patrizio Caturegli, Eoin P. Flanagan, Elias S. Sotirchos   +5 more
wiley   +1 more source

Relevance of Kappa and Lambda Free Light Chains in Autoimmune Astrocytopathy Associated With Anti‐GFAP Antibodies

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction The kappa‐free light chain (κ‐FLC) index is known to be highly sensitive and specific for diagnosing multiple sclerosis (MS), while little is understood about lambda (λ)‐FLC. This study assessed the κ‐FLC and λ‐FLC indices in autoimmune glial fibrillary acidic protein (GFAP) astrocytopathy.
Michael Levraut, Romain Marignier, Mikael Cohen, Jeanne Benoit, Cassandre Landes‐Chateau, Elisabeth Maillart, Marion Cremoni, Barbara Seitz‐Polski, Anne‐Laurie Pinto, Pauline Dumez, Jérôme Honnorat, Christine Lebrun‐Frenay   +11 more
wiley   +1 more source

PMSE PERFORMANCE OF THE BIASED ESTIMATORS IN A LINEAR REGRESSION MODEL WHEN RELEVANT REGRESSORS ARE OMITTED [PDF]

, 2002
Akio Namba
openalex   +1 more source

Letter to: Real‐World Clinical Experience With Serum MOG and AQP4 Antibody Testing by Live Versus Fixed Cell‐Based Assay

Annals of Clinical and Translational Neurology, EarlyView.
Adrian Budhram
wiley   +1 more source