Results 11 to 20 of about 6,880 (105)

Jackknife and bootstrapping resampling techniques to evaluate the precision of lens formula constants. [PDF]

Acta Ophthalmol
Abstract Purpose The purpose of this study was to develop a method for evaluating intraocular lens (IOL) formula constant uncertainties using two modern statistical techniques—jackknife and bootstrap resampling. Methods Using two datasets (dataset 1: 888 eyes treated with the aberration correcting Hoya Vivinex IOL, dataset 2: 821 eyes with the ...
Langenbucher A, Wendelstein J, Cayless A, Olsen T, Hoffmann P, Szentmáry N.   +5 more
europepmc   +2 more sources

Impact of Methodological Assumptions and Covariates on the Cutoff Estimation in ROC Analysis. [PDF]

Biom J
ABSTRACT The receiver operating characteristic (ROC) curve stands as a cornerstone in assessing the efficacy of biomarkers for disease diagnosis. Beyond merely evaluating performance, it provides with an optimal cutoff for biomarker values, crucial for disease categorization.
Ghosal S.
europepmc   +2 more sources

Using Extreme Value Statistics to Reconceptualize Psychopathology as Extreme Deviations From a Normative Reference Model. [PDF]

Hum Brain Mapp
Overview of our approach for extreme value statistics. First, we fit a normative model to imaging phenotypes, before employing a ‘peaks‐over‐threshold’ approach widely used in meteorology and finance. This allows us to model tail dependencies and provides a multivariate measure of extremely dependence through a tail pairwise dependency matrix (TPDM ...
Fraza C, Zabihi M, Beckmann CF, Marquand AF.   +3 more
europepmc   +2 more sources

Impact of length of stay on diagnostic yield in the epilepsy monitoring unit: A multi-center retrospective 12-year Veterans Health Administration study. [PDF]

Epilepsia Open
Abstract Objective Epilepsy Monitoring Units (EMUs) in Veterans Health Administration (VHA) Epilepsy Centers of Excellence (ECoE) are critical for the diagnosis and management of seizure disorders. Whether a shorter length of stay (LOS) in the EMU due to scheduling impacts diagnostic yield is unclear.
Feygin MS, Smith A, Gopinath Karicheri S, Haroun K, Khan O, Lopez MR, Eisenschenk S, Jones J, Reeder S, Towne AR, Ransom C, Medin K, Chen J, Tran T, Garga NI, Rincon-Flores N, Kellogg M, Tobochnik S, Haneef Z, Veterans Epilepsy Learning, Collaborative Research, and Operations (VELCRO) investigators.   +21 more
europepmc   +2 more sources

Development of Error Absorption Headroom Setting Algorithm Using Polynomial Surfaces to Create Reserve Power in PV Power Plants†

IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
This study proposes statistical models for mitigating the risks associated with variable power sources by establishing a headroom to absorb prediction errors when PV power plants perform day‐ahead planning without the use of battery systems or intraday market procurement. Specifically, three models are proposed in this study.
Jindan Cui, Xue Fang, Takashi Oozeki, Yuzuru Ueda   +3 more
wiley   +1 more source

Nonclassical Measurement Error in Farmland Markets with Implications for Ricardian Analysis

American Journal of Agricultural Economics, EarlyView.
Abstract Nonclassical measurement error threatens the validity of empirical economic models. We examine the extent to which land value measures that are commonly used in studies of the US farmland market are subject to nonclassical measurement error. We consider differences in county‐level land values from two popular data sources: (1) self‐reported ...
Daniel P. Bigelow, Margaret Jodlowski
wiley   +1 more source

Late payments, higher prices? An experimental investigation of competitive procurement

Decision Sciences, EarlyView.
Abstract The decision to pay one's supplier late is commonplace across global supply chains and, arguably, a key challenge for many businesses. In a multiple‐methods study, we contribute to the literature by documenting important empirical and anecdotal features about the likelihood and severity of late payments, formulating and solving a theoretical ...
Matthew J. Walker, Kyle Hyndman
wiley   +1 more source

Demand Systems Without Errors

International Economic Review, EarlyView.
ABSTRACT This paper describes a novel method for combining revealed preference analysis in the tradition of Afriat (1967, International Economic Review, 8: 76–77) with a statistical demand model. The approach is illustrated with an analysis of the labor supply of the nonneoclassical taxi drivers described in Farber (2005, Journal of Political Economy ...
Ian Crawford
wiley   +1 more source

Alternative Approaches for Estimating Highest‐Density Regions

International Statistical Review, EarlyView.
Summary Among the variety of statistical intervals, highest‐density regions (HDRs) stand out for their ability to effectively summarise a distribution or sample, unveiling its distinctive and salient features. An HDR represents the minimum size set that satisfies a certain probability coverage, and current methods for their computation require ...
Nina Deliu, Brunero Liseo
wiley   +1 more source

Monitoring panels of sparse functional data

Journal of Time Series Analysis, EarlyView.
Panels of random functions are common in applications of functional data analysis. They often occur when sequences of functions are observed at a number of different locations. We propose a methodology to monitor for structural breaks in such panels and to identify the changing components with statistical certainty.
Tim Kutta, Agnieszka Jach, Piotr Kokoszka   +2 more
wiley   +1 more source