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作者：Quinn, TJ II; Mizroch, SA
作者单位：University of Alaska System; University of Alaska Fairbanks; National Oceanic Atmospheric Admin (NOAA) - USA
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作者：Antoniadis, A; Fan, JQ
作者单位：Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Chinese University of Hong Kong
摘要：In this paper, we introduce nonlinear regularized wavelet estimators for estimating nonparametric regression functions when sampling points are not uniformly spaced. The approach can apply readily to many other statistical contexts. Various new penalty functions are proposed. The hard-thresholding and soft-thresholding estimators of Donoho and Johnstone are specific members of nonlinear regularized wavelet estimators. They correspond to the lower and upper envelopes of a class of the penalized...
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作者：Morris, JS; Wang, NY; Lupton, JR; Chapkin, RS; Turner, ND; Hong, MY; Carroll, RJ
作者单位：University of Texas System; UTMD Anderson Cancer Center; Texas A&M University System; Texas A&M University College Station; Texas A&M University System; Texas A&M University College Station; Texas A&M University System; Texas A&M University College Station
摘要：An important problem in studying the etiology of colon cancer is understanding the relationship between DNA adduct levels (broadly, DNA damage) in cells within colonic crypts in distal and proximal parts of the colon, following treatment with a carcinogen and different types of diet. In particular, it is important to understand whether rats who have elevated adduct levels in particular positions in distal region crypts also have elevated levels in the same positions of the crypts in proximal r...
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作者：Solo, V
作者单位：University of New South Wales Sydney
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作者：Goldman, DR; Bhattacharya, J; McCaffrey, DF; Duan, N; Leibowitz, AA; Joyce, GF; Morton, SC
作者单位：RAND Corporation; University of California System; University of California Los Angeles; University of California Los Angeles Medical Center; David Geffen School of Medicine at UCLA; University of California System; University of California Los Angeles
摘要：As policymakers consider expanding insurance coverage for individuals infected with human immunodeficiency virus (HIV), it is useful to ask if insurance has any affect on health outcomes and, if so, whether its magnitude has changed with recent efficacious but expensive treatments. By using data from a nationally representative cohort of HIV-infected (HIV+) persons receiving regular medical care, we estimate the impact of insurance on mortality in this population. A naive single-equation model...
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作者：Bunzel, H; Kiefer, NM; Vogelsang, TJ
作者单位：Iowa State University; Cornell University; Cornell University; Aarhus University
摘要：We develop test statistics to test hypotheses in nonlinear weighted regression models with serial correlation or conditional heteroscedasticity of unknown form. The novel aspect is that these tests are simple and do not require the use of heteroseedasticity autocorrelation-consistent (HAC) covariance matrix estimators. Th-is new class of tests uses stochastic transformations to eliminate nuisance parameters as a substitute for consistently estimating the nuisance parameters. We derive the limi...
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作者：Zaslavsky, AM; Schenker, N; Belin, TR
作者单位：Harvard University; Centers for Disease Control & Prevention - USA; CDC National Center for Health Statistics (NCHS); University of California System; University of California Los Angeles
摘要：Certain clusters may be extremely influential on survey estimates and consequently contribute disproportionately to their variance, We propose a general approach to estimation that downweights highly influential clusters, with the amount of downweighting based on M-estimation applied to the empirical influence of the clusters, The method is motivated by a problem in census coverage estimation, and we illustrate it by using data from the 1990 Post Enumeration Survey (PES). in this context, an o...
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作者：Cai, TT
作者单位：University of Pennsylvania
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作者：Li, KC; Shedden, K
作者单位：University of California System; University of California Los Angeles; University of Michigan System; University of Michigan
摘要：Digital deconvolution concerns the restoration of an underlying discrete signal from a blurred noisy observation sequence. The problem can be formulated in a Bayesian framework. As is usual in the Bayesian context, the computation of relevant posterior quantities is the major challenge. Previous work made substantial progress toward making this computation feasible, most notably through the Gibbs sampling approach of Chen and Li and the sequential importance sampling approach of Liu and Chen. ...
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作者：Moulin, P
作者单位：University of Illinois System; University of Illinois Urbana-Champaign
