Journal of the American Statistical Association

最新文章

• Effect of insurance on mortality in an HIV-positive population in care AI翻译
  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...
• Inference for the complier-average causal effect from longitudinal data subject to noncompliance and missing data, with application to a job training assessment for the unemployed AI翻译
  作者：Yau, LHY; Little, RJ
  作者单位：GlaxoSmithKline; Glaxosmithkline USA; University of Michigan System; University of Michigan
  摘要：Longitudinal studies involving human participants are often complicated by subjects who do not comply with their treatment assignment or do not provide complete data. A treatment effect of interest in the presence of noncompliance is the complier-average causal effect (CACE; Imbens and Rubin 1997a), which is the treatment effect for subjects who would comply regardless of the assigned treatment. Imbens and Rubin (1997a,b) proposed maximum likelihood and Bayesian inferential methods for CACE, w...
• Spatiotemporal hierarchical Bayesian modeling: Tropical ocean surface winds AI翻译
  作者：Wikle, CK; Milliff, RF; Nychka, D; Berliner, LM
  作者单位：University of Missouri System; University of Missouri Columbia; National Center Atmospheric Research (NCAR) - USA; University System of Ohio; Ohio State University
  摘要：Spatiotemporal processes are ubiquitous in the environmental and physical sciences. This is certainly true of atmospheric and oceanic processes, which typically exhibit many different scales of spatial and temporal variability. The complexity of these processes and the large number of observation/prediction locations preclude the use of traditional covariance-based spatiotemporal statistical methods. Alternatively, we focus on conditionally specified (i.e., hierarchical) spatiotemporal models....
• Jackknife variance estimation for nearest-neighbor imputation AI翻译
  作者：Chen, JH; Shao, J
  作者单位：University of Waterloo; University of Wisconsin System; University of Wisconsin Madison
  摘要：Nearest-neighbor imputation is a popular hot deck imputation method used to compensate for nonresponse in sample surveys. Although this method has a long history of application, the problem of variance estimation after nearest-neighbor imputation has not been fully investigated. Because nearest-neighbor imputation is a nonparametric method, a nonparametric variance estimation technique, such as the jackknife, is desired. We show that the naive jackknife that treats imputed values as observed d...
• Markov chain Monte Carlo estimation of classical and dynamic switching and mixture models AI翻译
  作者：Frühwirth-Schnatter, S
  作者单位：Vienna University of Economics & Business
  摘要：Bayesian estimation of a very general model class, where the distribution of the observations depends on a latent process laking values in a discrete state space, is discussed in this article. This model class covers finite mixture modeling, Markov switching autoregressive modeling. and dynamic linear models with switching. The consequences the unidentifiability of this type of model has on Markov chain Monte Carlo (MCMC) estimation are explicitly dealt with. Joint Bayesian estimation of all l...
• Statistical meetings: View of past, vision of future AI翻译
  作者：O'Fallon, WM
  作者单位：Mayo Clinic
• Local harmonic estimation in musical sound signals AI翻译
  作者：Irizarry, RA
  作者单位：Johns Hopkins University
  摘要：Statistical modeling and analysis have been applied to different music-related fields, including sound synthesis and analysis. Sound can be represented as a real-valued function of time. This function can be sampled at a sufficiently small rate such that the resulting discrete version is a good approximation of the continuous version, thus enabling the study of musical sounds as a discrete rime series, an entity for which many statistical techniques are available. Physical modeling suggests th...
• Pay phones, parking meters, vending machines, and optimal Bayesian decisions on collection times AI翻译
  作者：Maitra, R; Dalal, SR
  作者单位：University System of Maryland; University of Maryland Baltimore; Ericsson; Telcordia Technologies
  摘要：Payphones, parking meters, and vending machines illustrate the modem business practice of substituting machinery for manpower. They do nor eliminate manual labor completely, because full coin-boxes still must be replaced and vending machines still must be stocked. Deciding when to replace a coin-box is important, with unequal losses resulting from underestimation and overestimation. This article derives optimal methodology for this problem by incorporating collection history and specifying com...
• Semiparametric nonlinear mixed-effects models and their applications - Comment AI翻译
  作者：Bates, DM; Lindstrom, MJ; Wahba, G
  作者单位：University of Wisconsin System; University of Wisconsin Madison; University of Wisconsin System; University of Wisconsin Madison
• One-level rotation design balanced on time in monthly sample and in rotation group AI翻译
  作者：Park, YS; Kim, KW; Choi, JW
  作者单位：Korea University; Korea University; Centers for Disease Control & Prevention - USA; CDC National Center for Health Statistics (NCHS)
  摘要：We introduce the two-way balanced one-level rotation design for which balancing is done on interview time in sample and in rotation group and provide the necessary and sufficient condition for the two-way balancing and an algorithm to construct such design. Using this design, we obtain generalized composite estimators (GCE) and the minimum variance linear unbiased estimator (MVLUE). We then calculate their variance and mean squared error (MSE) when there exist two types of correlations and the...