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Journal of the Korean Statistical Society最新文献

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Statistical inference of pth-order generalized binomial autoregressive model pth 阶广义二项式自回归模型的统计推断
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-07-13 DOI: 10.1007/s42952-024-00276-1
Jie Zhang, Siyu Shao, Dehui Wang, Danshu Sheng
{"title":"Statistical inference of pth-order generalized binomial autoregressive model","authors":"Jie Zhang, Siyu Shao, Dehui Wang, Danshu Sheng","doi":"10.1007/s42952-024-00276-1","DOIUrl":"https://doi.org/10.1007/s42952-024-00276-1","url":null,"abstract":"<p>To capture the higher-order autocorrelation structure for finite-range integer-valued time series of counts, and to consider the interdependence between individuals, a <i>p</i>th-order generalized binomial autoregressive (GBAR(<i>p</i>)) process is proposed in this paper. The stationarity and ergodicity of the GBAR(<i>p</i>) model are proved, and the basic probabilistic and statistical properties of the model are discussed. The unknown parameters are estimated by the conditional least squares and conditional maximum likelihood methods. The performances of two kinds of estimators are studied via simulations, and the forecasting problem of this model is also considered in this paper. Finally, the model is applied to a real data set and compared with some existing models to investigate the rationality of the GBAR(<i>p</i>) model.</p>","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141615049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Strong convergence of a nonparametric relative error regression estimator under missing data with functional predictors 非参数相对误差回归估计器在有功能预测因子的缺失数据下的强收敛性
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-07-07 DOI: 10.1007/s42952-024-00275-2
Adel Boucetta, Zohra Guessoum, Elias Ould-Said
{"title":"Strong convergence of a nonparametric relative error regression estimator under missing data with functional predictors","authors":"Adel Boucetta, Zohra Guessoum, Elias Ould-Said","doi":"10.1007/s42952-024-00275-2","DOIUrl":"https://doi.org/10.1007/s42952-024-00275-2","url":null,"abstract":"<p>In this paper, we develop a nonparametric estimator of the regression function for a functional explanatory variable and a scalar response variable that is subject to left truncation and right censoring. The estimator is constructed by minimizing the mean squared relative error, which is a robust criterion that reduces the impact of outliers relatively to the Nadaraya Watson estimator. We prove the pointwise and uniform convergence of the estimator under some regular conditions and assess its performance by a numerical study. We also investigate the robustness of the estimator using the influence function as a measure of sensitivity to outliers and apply the estimator to a real dataset.</p>","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141571711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling and inferences for bounded multivariate time series of counts 有界多元计数时间序列的建模和推论
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-06-25 DOI: 10.1007/s42952-024-00273-4
Sangyeol Lee, Minyoung Jo
{"title":"Modeling and inferences for bounded multivariate time series of counts","authors":"Sangyeol Lee, Minyoung Jo","doi":"10.1007/s42952-024-00273-4","DOIUrl":"https://doi.org/10.1007/s42952-024-00273-4","url":null,"abstract":"<p>This paper considers modeling bounded multivariate time series of counts and the inferential procedures of this model. For modeling, we introduce a hybrid type model similar to the scheme of integer-valued autoregressive (INAR) and conditional autoregressive heteroscedastic (INARCH) models. To estimate the model parameters, we use the conditional least squares estimator (CLSE) and minimum density power divergence estimator (MDPDE). To evaluate the small sample performances of the proposed estimators, we conduct a Monte Carlo simulation study and demonstrate that the proposed methods work well. Real data analysis is also carried out using syphilis data in the U.S. for illustration.</p>","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bayesian hierarchical spatial model for small-area estimation with non-ignorable nonresponses and its application to the NHANES dental caries data 贝叶斯分层空间模型用于具有不可忽略非响应的小区域估算及其在 NHANES 龋齿数据中的应用
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-06-22 DOI: 10.1007/s42952-024-00274-3
Ick Hoon Jin, Fang Liu, Jina Park, Evercita Eugenio, Suyu Liu
{"title":"Bayesian hierarchical spatial model for small-area estimation with non-ignorable nonresponses and its application to the NHANES dental caries data","authors":"Ick Hoon Jin, Fang Liu, Jina Park, Evercita Eugenio, Suyu Liu","doi":"10.1007/s42952-024-00274-3","DOIUrl":"https://doi.org/10.1007/s42952-024-00274-3","url":null,"abstract":"<p>The National Health and Nutrition Examination Survey (NHANES) is a major program of the National Center for Health Statistics, designed to assess the health and nutritional status of adults and children in the United States. The analysis of NHANES dental caries data faces several challenges, including (1) the data were collected using a complex, multistage, stratified, unequal-probability sampling design; (2) the sample size of some primary sampling units (PSU), e.g., counties, is very small; (3) the measures of dental caries have complicated structure and correlation, and (4) there is a substantial percentage of nonresponses, which are expected not to be missing at random or non-ignorable. We propose a Bayesian hierarchical spatial model to address these analysis challenges. We develop a two-level Potts model that closely resembles the caries evolution process, and captures complicated spatial correlations between teeth and surfaces of the teeth. By adding Bayesian hierarchies to the Potts model, we account for the multistage survey sampling design, while also enabling information borrowing across PSUs for small-area estimation. We incorporate sampling weights by including them as a covariate in the model and adopt flexible B-splines to achieve robust inference. We account for non-ignorable missing outcomes and covariates using the selection model. We use data augmentation coupled with the noisy Monte Carlo algorithm to overcome the numerical difficulty caused by doubly-intractable normalizing constants and sample posteriors. Our analysis results show strong spatial associations between teeth and tooth surfaces, including that dental hygienic factors, such as fluorosis and sealant, reduce dental disease risks.</p>","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An index for measuring degree of departure from symmetry for ordinal square contingency tables 衡量序方差表偏离对称程度的指数
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-06-16 DOI: 10.1007/s42952-024-00271-6
Shuji Ando, Tomotaka Momozaki, Yuta Masusaki, Sadao Tomizawa
{"title":"An index for measuring degree of departure from symmetry for ordinal square contingency tables","authors":"Shuji Ando, Tomotaka Momozaki, Yuta Masusaki, Sadao Tomizawa","doi":"10.1007/s42952-024-00271-6","DOIUrl":"https://doi.org/10.1007/s42952-024-00271-6","url":null,"abstract":"<p>For the analysis of square contingency tables with the same row and column ordinal classifications, this study proposes an index for measuring the degree of departure from the symmetry model using new cumulative probabilities. The proposed index is constructed based on the Cressie and Read’s power divergence, or the weighted average of the Patil and Taillie’s diversity index. This study derives a plug-in estimator of the proposed index and an approximate confidence interval for the proposed index. The estimator of the proposed index is expected to reduce the bias more than the estimator of the existing index, even when the sample size is not large. The proposed index is identical to the existing index under the conditional symmetry model. Therefore, assuming the probability structure in which the conditional symmetry model holds, the performances of plug-in estimators of the proposed and existing indexes can be simply compared. Through numerical examples and real data analysis, the usefulness of the proposed index compared to the existing index is demonstrated.</p>","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimal designs for comparing several regression curves 比较多条回归曲线的最佳设计
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-06-14 DOI: 10.1007/s42952-024-00272-5
Chang-Yu Liu, Xin Liu, Rong-Xian Yue
{"title":"Optimal designs for comparing several regression curves","authors":"Chang-Yu Liu, Xin Liu, Rong-Xian Yue","doi":"10.1007/s42952-024-00272-5","DOIUrl":"https://doi.org/10.1007/s42952-024-00272-5","url":null,"abstract":"","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141345353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multiple values-inflated bivariate INAR time series of counts: featuring zero–one inflated Poisson-Lindly case 多值膨胀的双变量 INAR 计数时间序列：以零一膨胀的泊松-林德利案例为特色
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-06-01 DOI: 10.1007/s42952-024-00269-0
Sangyeol Lee, Minyoung Jo
{"title":"Multiple values-inflated bivariate INAR time series of counts: featuring zero–one inflated Poisson-Lindly case","authors":"Sangyeol Lee, Minyoung Jo","doi":"10.1007/s42952-024-00269-0","DOIUrl":"https://doi.org/10.1007/s42952-024-00269-0","url":null,"abstract":"<p>This study considers multiple values-inflated bivariate integer-valued autoregressive (MV-inflated BINAR) models. It develops the inferential procedures for parameter estimation on this model, which apply to constructing a change point test and outlier detection rule. We first introduce the MV-inflated BINAR model with one parameter exponential family and Poisson-Lindley innovations. Then, we propose a quasi-maximum likelihood estimator (QMLE) and divergence-based estimator featuring minimum density power divergence estimator (MDPDE) for robust estimation. To evaluate the performance of these estimators, we conduct Monte Carlo simulations and demonstrate the adequacy of MDPDE in zero–one inflated models. Real data analysis is also carried out using the number of monthly earthquake cases in the United States.</p>","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Linear hypothesis testing in ultra high dimensional generalized linear mixed models 超高维广义线性混合模型中的线性假设检验
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-05-18 DOI: 10.1007/s42952-024-00268-1
Xiyun Zhang, Zaixing Li
{"title":"Linear hypothesis testing in ultra high dimensional generalized linear mixed models","authors":"Xiyun Zhang, Zaixing Li","doi":"10.1007/s42952-024-00268-1","DOIUrl":"https://doi.org/10.1007/s42952-024-00268-1","url":null,"abstract":"<p>This paper is concerned with linear hypothesis testing problems in ultra high dimensional generalized linear mixed models where the response and the random effects are distribution-free. The constrained-partial-regularization based penalized quasi-likelihood method is proposed and the corresponding statistical properties are studied. To test linear hypotheses, we propose a partial penalized quasi-likelihood ratio test, a partial penalized quasi-score test, and a partial penalized Wald test. The theoretical properties of these three tests are established under both the null and the alternatives. The finite sample performance of the proposed tests has been shown by the simulation studies, and the forest health data is illustrated by our procedure.</p>","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141062927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing social media post popularity prediction with visual content 利用视觉内容加强社交媒体帖子受欢迎程度预测
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-05-03 DOI: 10.1007/s42952-024-00270-7
Dahyun Jeong, Hyelim Son, Yunjin Choi, Keunwoo Kim
{"title":"Enhancing social media post popularity prediction with visual content","authors":"Dahyun Jeong, Hyelim Son, Yunjin Choi, Keunwoo Kim","doi":"10.1007/s42952-024-00270-7","DOIUrl":"https://doi.org/10.1007/s42952-024-00270-7","url":null,"abstract":"","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141129822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Implementation of the sequential optimal design strategy in Type-II progressive censoring with the GLM-based mechanism 利用基于 GLM 的机制，在第二类渐进剔除中实施顺序优化设计策略
IF 0.6 4区 数学
Journal of the Korean Statistical Society Pub Date : 2024-04-10 DOI: 10.1007/s42952-024-00266-3
Fatemeh Hassantabar Darzi, Firoozeh Haghighi, Samaneh Eftekhari Mahabadi
{"title":"Implementation of the sequential optimal design strategy in Type-II progressive censoring with the GLM-based mechanism","authors":"Fatemeh Hassantabar Darzi, Firoozeh Haghighi, Samaneh Eftekhari Mahabadi","doi":"10.1007/s42952-024-00266-3","DOIUrl":"https://doi.org/10.1007/s42952-024-00266-3","url":null,"abstract":"<p>Single-objective optimal designs might be criticized for not covering all aspects of the experiment when the experiment possesses multiple goals. In such a case, multi-objective optimal design is of interest. This paper adopts a sequential approach to obtain a multi-objective optimal design for Type-II progressive censoring with a dependent GLM-based random removal mechanism. Several simulation studies are conducted to evaluate and compare the performance of the proposed approach. A sensitivity analysis has been performed to investigate the effect of misspecification of design input parameters. Also, the sequential optimal design solution is used to construct the bounds in the <span>(epsilon)</span>-constraint optimal design. Finally, the usefulness of the proposed strategy is demonstrated through two real-life data analyses.</p>","PeriodicalId":49992,"journal":{"name":"Journal of the Korean Statistical Society","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140577553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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