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Keywords: kernel smoothing
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Dynamic Factor Analysis of High-Dimensional Recurrent Events Open Access
F Chen and others
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Biometrika
Biometrika, asaf028, https://doi.org/10.1093/biomet/asaf028
Published: 12 April 2025
... of these inference tools. The proposed method is applied to grocery shopping data, for which an interpretable factor structure is obtained. Counting process Factor analysis Information criterion Kernel smoothing Marginal modelling Page 1 of 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26...
Journal Article
Moving beyond population variable importance: concept, theory and applications of individual variable importance
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Guorong Dai and others
Journal of the Royal Statistical Society Series B: Statistical Methodology, qkae115, https://doi.org/10.1093/jrsssb/qkae115
Published: 16 December 2024
... kernel smoothing non-parametric regression National Natural Science Foundation of China 10.13039/501100001809 12401342 72271060 Shanghai Committee of Science and Technology 24ZR1405700 National Institute of Health R01-HL138306 R01-CA236468 R01-GM140463 For risk assessment...
Journal Article
Adaptive functional principal components analysis
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Sunny G W Wang and others
Journal of the Royal Statistical Society Series B: Statistical Methodology, qkae106, https://doi.org/10.1093/jrsssb/qkae106
Published: 02 December 2024
...-validation after pooling all the curves together quickly become computationally unfeasible due to the large number of data points. In this paper, we propose a new data-driven, adaptive kernel smoothing, specifically tailored for functional principal components analysis through the derivation of sharp...
Journal Article
A semiparametric Gaussian mixture model for chest CT-based 3D blood vessel reconstruction Free
Qianhan Zeng and others
Biostatistics, Volume 26, Issue 1, 2025, kxae013, https://doi.org/10.1093/biostatistics/kxae013
Published: 19 April 2024
... tomography Gaussian mixture model nonparametric kernel smoothing TensorFlow National Natural Science Foundation of China 10.13039/501100001809 72171226 National Statistical Science Research Project 2023LD008 Computed tomography (CT) is an advanced 3D imaging technology capable of generating...
Journal Article
Estimating spot volatility under infinite variation jumps with dependent market microstructure noise
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Qiang Liu and Zhi Liu
The Econometrics Journal, Volume 27, Issue 2, May 2024, Pages 278–298, https://doi.org/10.1093/ectj/utae001
Published: 12 January 2024
... the empirical characteristic function of the observation increments, and Liu et al. ( 2018 ) extended their method to estimating spot volatility via kernel smoothing. Based on the empirical characteristic function, Kong ( 2019 ) presented a novel test for jumps of infinite variation. All these mentioned...
Journal Article
Powers Correlation Analysis of Returns with a Non-stationary Zero-Process
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Valentin Patilea and Hamdi Raïssi
Journal of Financial Econometrics, Volume 22, Issue 5, Autumn 2024, Pages 1345–1371, https://doi.org/10.1093/jjfinec/nbad025
Published: 13 September 2023
... are only short-run in many cases. higher order dynamics kernel smoothing missing observations portmanteau test zeros C01 C32 Romanian Ministry of Research, Innovation and Digitization PN-III-P4-ID-PCE-2020-1112 Fondecyt 10.13039/501100002850 1201898 When P ( a t = 1 ) = 1...
Journal Article
Asynchronous and Error-Prone Longitudinal Data Analysis via Functional Calibration Free
Xinyue Chang and others
in
Biometrics
Biometrics, Volume 79, Issue 4, December 2023, Pages 3374–3387, https://doi.org/10.1111/biom.13866
Published: 12 April 2023
... that implements the kernel smoothing method in Hoover et al. (1998) and its built-in cross-validation procedure to choose the bandwidth. As a comparison, we consider the following estimators, that is, the Oracle estimator with the known synchronized true values of X, the KW estimator ( Cao et al., 2015...
Journal Article
On Functional Processes with Multiple Discontinuities Free
Jialiang Li and others
Journal of the Royal Statistical Society Series B: Statistical Methodology, Volume 84, Issue 3, July 2022, Pages 933–972, https://doi.org/10.1111/rssb.12493
Published: 09 March 2022
... to provide an illustration. change point convergence rate functional data kernel smoothing phase transition structural break Academic Research Funds R-155-000-205-114 R-155-000-195-114 Tier 2 MOE funds in Singapore MOE2017-T2-2-082 R-155-000-197-112 R-155-000-197-113 National Science...
Journal Article
Semiparametric Additive Time-Varying Coefficients Model for Longitudinal Data with Censored Time Origin Free
Yanqing Sun and others
in
Biometrics
Biometrics, Volume 79, Issue 2, June 2023, Pages 695–710, https://doi.org/10.1111/biom.13610
Published: 07 December 2021
... coupled with the kernel smoothing and EM algorithm are developed in Section 2.2 . Computational issues about estimation at the boundaries and the weight selection are discussed in Section 2.3 . In Section 3 , we establish asymptotic properties of the nonparametric and parametric estimators...
Journal Article
Statistical inference on shape and size indexes for counting processes
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Yifei Sun and others
in
Biometrika
Biometrika, Volume 109, Issue 1, March 2022, Pages 195–208, https://doi.org/10.1093/biomet/asab008
Published: 12 February 2021
...{\scriptscriptstyle T} }} X_j) \int_{0}^{\tau} \int_{0}^{\tau} I( uKernel smoothing Rate function Recurrent event Recurrent event data have a wide application in various fields, including medicine...
Journal Article
A Kernel Regression Model for Panel Count Data with Nonparametric Covariate Functions Free
Yang Wang and Zhangsheng Yu
in
Biometrics
Biometrics, Volume 78, Issue 2, June 2022, Pages 586–597, https://doi.org/10.1111/biom.13440
Published: 09 February 2021
...-validation kernel smoothing local pseudo-partial log-likelihood nonparametric analysis Shanghai Jiao Tong University 10.13039/501100004921 STAR Grant 20190102 Yu National Natural Science Foundation of China 10.13039/501100001809 11671256 Yu In numerous clinical studies, subjects often...
Journal Article
Boosted Kernel Weighting – Using Statistical Learning to Improve Inference from Nonprobability Samples
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Christoph Kern and others
Journal of Survey Statistics and Methodology, Volume 9, Issue 5, November 2021, Pages 1088–1113, https://doi.org/10.1093/jssam/smaa028
Published: 03 December 2020
... in population mean estimation via simulations and a real data example. Our results indicate that particularly boosting methods represent promising alternatives to logistic regression and result in KW estimates with lower bias in a variety of settings, without increasing variance. Kernel smoothing Machine...
Journal Article
Nonparametric Mass Imputation for Data Integration
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Sixia Chen and others
Journal of Survey Statistics and Methodology, Volume 10, Issue 1, February 2022, Pages 1–24, https://doi.org/10.1093/jssam/smaa036
Published: 17 November 2020
...) and the noninformative sampling mechanism assumption for sample B. However, their proposed method relies on a correctly specified model for m(x). In Section 3, we relax this strong assumption and propose nonparametric and semiparametric mass imputation using kernel smoothing and generalized...
Journal Article
Evaluation of Longitudinal Surrogate Markers Free
Denis Agniel and Layla Parast
in
Biometrics
Biometrics, Volume 77, Issue 2, June 2021, Pages 477–489, https://doi.org/10.1111/biom.13310
Published: 07 June 2020
... via a simulation study. We apply our proposed procedures to an AIDS clinical trial dataset to examine a trajectory of CD4 counts as a potential surrogate. functional data kernel smoothing longitudinal data nonparametric analysis surrogate markers National Institute of Diabetes and Digestive...
Journal Article
Improving External Validity of Epidemiologic Cohort Analyses: a Kernel Weighting Approach Free
Lingxiao Wang and others
Journal of the Royal Statistical Society Series A: Statistics in Society, Volume 183, Issue 3, June 2020, Pages 1293–1311, https://doi.org/10.1111/rssa.12564
Published: 25 April 2020
...Lingxiao Wang; Barry I. Graubard; Hormuzd A. Katki; and Yan Li Cohort studies Complex survey sample Jackknife variance estimation Kernel smoothing Propensity score weighting Taylor series linearization variance In this section, we propose a KW approach to create pseudoweights for the cohort...
Journal Article
Estimating Average Treatment Effects with a Double-Index Propensity Score
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David Cheng and others
in
Biometrics
Biometrics, Volume 76, Issue 3, September 2020, Pages 767–777, https://doi.org/10.1111/biom.13195
Published: 04 December 2019
... cancer risk in an electronic medical record study and the effect of smoking on C-reactive protein in the Framingham Offspring Study. causal inference double-robustness electronic medical records kernel smoothing regularization semiparametric efficiency National Institutes of Health 10.13039...
Journal Article
Kernel estimation for panel data with heterogeneous dynamics
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Ryo Okui and Takahide Yanagi
The Econometrics Journal, Volume 23, Issue 1, January 2020, Pages 156–175, https://doi.org/10.1093/ectj/utz019
Published: 26 October 2019
.../standard_publication_model ) Summary This paper proposes nonparametric kernel-smoothing estimation for panel data to examine the degree of heterogeneity across cross-sectional units. We first estimate the sample mean, autocovariances, and autocorrelations for each unit and then apply kernel smoothing to compute...
Journal Article
Using a Surrogate Marker for Early Testing of a Treatment Effect
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Layla Parast and others
in
Biometrics
Biometrics, Volume 75, Issue 4, December 2019, Pages 1253–1263, https://doi.org/10.1111/biom.13067
Published: 22 April 2019
...Layla Parast; Tianxi Cai; Lu Tian kernel smoothing nonparametric method resampling surrogate survival analysis testing National Institute of Diabetes and Digestive and Kidney Diseases 10.13039/100000062 R01DK11835 R21DK1031184 Correspondence Layla Parast, Statistics Group, RAND...
Journal Article
Bootstrap of residual processes in regression: to smooth or not to smooth?
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N Neumeyer and I Van Keilegom
in
Biometrika
Biometrika, Volume 106, Issue 2, June 2019, Pages 385–400, https://doi.org/10.1093/biomet/asz009
Published: 08 April 2019
... the accuracy of this bootstrap procedure for various models, testing procedures and sample sizes. Empirical distribution function Kernel smoothing Linear regression Location model Nonparametric regression Consider the model (1) \begin{eqnarray}
Y = m(X) + \varepsilon,
\end{eqnarray} where...
Journal Article
Testing Critical Points of Non-Parametric Regression Curves: Application to the Management of Stalked Barnacles Free
Marta Sestelo and Javier Roca-Pardiñas
Journal of the Royal Statistical Society Series C: Applied Statistics, Volume 68, Issue 4, August 2019, Pages 1051–1070, https://doi.org/10.1111/rssc.12336
Published: 31 January 2019
... Bootstrap Derivatives Factor-by-curve interaction Kernel smoothing Non-parametric regression Overexploitation or overfishing is the removal of marine living resources to levels that cannot sustain viable populations. A barnacle fishery, which commands high prices in the market, provides a perfect...
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