Journal articleSankhya A · November 1, 2024
The title of this article is (essentially) the same as the famous paper Basu (2011b). Basu often opined that counterexamples were the best way to learn limitations of theories or methods and I have followed his directive in my own teaching. A number of cou ...
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Journal articleTest · March 1, 2021
Informally, ‘information inconsistency’ is the property that has been observed in some Bayesian hypothesis testing and model selection scenarios whereby the Bayesian conclusion does not become definitive when the data seem to become definitive. An example ...
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Journal articleFrontiers in Earth Science · December 16, 2020
Effective volcanic hazard management in regions where populations live in close proximity to persistent volcanic activity involves understanding the dynamic nature of hazards, and associated risk. Emphasis until now has been placed on identification and fo ...
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Journal articleAnnals of Statistics · August 1, 2020
Bayesian analysis for the covariance matrix of a multivariate normal distribution has received a lot of attention in the last two decades. In this paper, we propose a new class of priors for the covariance matrix, including both inverse Wishart and referen ...
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Journal articleJournal of Multivariate Analysis · July 1, 2020
Hierarchical models are the workhorse of much of Bayesian analysis, yet there is uncertainty as to which priors to use for hyperparameters. Formal approaches to objective Bayesian analysis, such as the Jeffreys-rule approach or reference prior approach, ar ...
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Journal articleSankhya the Indian Journal of Statistics · January 1, 2020
We consider the standard problem of multiple testing of normal means, ob-taining Bayesian multiplicity control by assuming that the prior inclusion probability (the assumed equal prior probability that each mean is nonzero) is unknown and assigned a prior ...
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Journal articleBayesian Analysis · January 1, 2020
In Bayesian hypothesis testing and model selection, prior distributions must be chosen carefully. For example, setting arbitrarily large prior scales for location parameters, which is common practice in estimation problems, can lead to undesirable behavior ...
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Journal articleBayesian Analysis · January 1, 2020
The problem of testing mutually exclusive hypotheses with dependent test statistics is considered. Bayesian and frequentist approaches to multiplicity control are studied and compared to help gain understanding as to the effect of test statistic dependence ...
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Journal articleStatistical Science · November 1, 2019
This article gives a panoramic survey of the general area of parametric statistical inference, decision theory and foundations of statistics for the period 1965-2010 through the lens of Larry Brown's contributions to varied aspects of this massive area. Th ...
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Journal articleR Journal · June 1, 2019
Gaussian stochastic process (GaSP) emulation is a powerful tool for approximating computationally intensive computer models. However, estimation of parameters in the GaSP emulator is a challenging task. No closed-form estimator is available and many numeri ...
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Journal articleJournal of Mathematical Psychology · April 1, 2019
The following list provides a description of the corrections to the publication since the original version was printed. Page 94: In the fifth paragraph the following sentence appears: “For the control group, the mean is 0, while for the treatment group, th ...
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Journal articleAmerican Statistician · March 29, 2019
Researchers commonly use p-values to answer the question: How strongly does the evidence favor the alternative hypothesis relative to the null hypothesis? p-Values themselves do not directly answer this question and are often misinterpreted in ways that le ...
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Journal articleAnnual Review of Statistics and Its Application · March 7, 2019
The use of models to try to better understand reality is ubiquitous. Models have proven useful in testing our current understanding of reality; for instance, climate models of the 1980s were built for science discovery, to achieve a better understanding of ...
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Journal articleStatistical Theory and Related Fields · January 2, 2019
We present a new approach to model selection and Bayes factor determination, based on Laplace expansions (as in BIC), which we call Prior-based Bayes Information Criterion (PBIC). In this approach, the Laplace expansion is only done with the likelihood fun ...
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Journal articleAnnals of Statistics · January 1, 2018
We consider estimation of the parameters of a Gaussian Stochastic Process (GaSP), in the context of emulation (approximation) of computer models for which the outcomes are real-valued scalars. The main focus is on estimation of the GaSP parameters through ...
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Journal articleSIAM Asa Journal on Uncertainty Quantification · January 1, 2018
Direct coupling of computer models is often difficult for computational and logistical reasons. We propose coupling computer models by linking independently developed Gaussian process emulators (GaSPs) of these models. Linked emulators are developed that a ...
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Journal articleAnnals of Applied Statistics · September 1, 2016
We consider the problem of emulating (approximating) computer models (simulators) that produce massive output. The specific simulator we study is a computer model of volcanic pyroclastic flow, a single run of which produces up to 109 outputs ove ...
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Journal articleJournal of mathematical psychology · June 2016
Much of science is (rightly or wrongly) driven by hypothesis testing. Even in situations where the hypothesis testing paradigm is correct, the common practice of basing inferences solely on p-values has been under intense criticism for over 50 years ...
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Journal articleSIAM Asa Journal on Uncertainty Quantification · January 1, 2016
Gaussian processes are a popular tool for nonparametric function estimation because of their flexibility and the fact that much of the ensuing computation is parametric Gaussian computation. Often, the function is known to be in a shape-constrained class, ...
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Journal articleBayesian Analysis · March 1, 2015
In multi-parameter models, reference priors typically depend on the parameter or quantity of interest, and it is well known that this is necessary to produce objective posterior distributions with optimal properties. There are, however, many situations whe ...
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Journal articleInternational Journal for Uncertainty Quantification · January 1, 2015
This paper presents a novel approach to assessing the hazard threat to a locale due to a large volcanic avalanche. The methodology combines: (i) mathematical modeling of volcanic mass flows; (ii) field data of avalanche frequency, volume, and runout; (iii) ...
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Journal articleEconometric Reviews · February 1, 2014
Model selection procedures often depend explicitly on the sample size n of the experiment. One example is the Bayesian information criterion (BIC) criterion and another is the use of Zellner-Siow priors in Bayesian model selection. Sample size is well-defi ...
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Journal articleJournal of biopharmaceutical statistics · January 2014
This article discusses subgroup identification, the goal of which is to determine the heterogeneity of treatment effects across subpopulations. Searching for differences among subgroups is challenging because it is inherently a multiple testing problem wit ...
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Journal articleSIAM Asa Journal on Uncertainty Quantification · January 1, 2014
This paper describes an efficient and systematic process for using geophysical computer model simulations to guide efforts in probabilistic hazard mapping. The framework being proposed requires the simultaneous construction of many (102–104 ...
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Journal articleAnnals of Applied Statistics · March 1, 2013
Item response theory (IRT) models have been widely used in educational measurement testing. When there are repeated observations available for individuals through time, a dynamic structure for the latent trait of ability needs to be incorporated into the m ...
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Journal articleJournal of the American Statistical Association · August 2, 2012
This article considers the development of objective prior distributions for discrete parameter spaces. Formal approaches to such development-such as the reference prior approach-often result in a constant prior for a discrete parameter, which is questionab ...
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Journal articleAnnals of Statistics · June 1, 2012
In objective Bayesian model selection, no single criterion has emerged as dominant in defining objective prior distributions. Indeed, many criteria have been separately proposed and utilized to propose differing prior choices. We first formalize the most g ...
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Journal articleStatistical science : a review journal of the Institute of Mathematical Statistics · January 2012
Bayesian nonparametric regression with dependent wavelets has dual shrinkage properties: there is shrinkage through a dependent prior put on functional differences, and shrinkage through the setting of most of the wavelet coefficients to zero through Bayes ...
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Journal articleStatistical Methodology · January 1, 2012
We describe work in progress by a collaboration of astronomers and statisticians developing a suite of Bayesian data analysis tools for extrasolar planet (exoplanet) detection, planetary orbit estimation, and adaptive scheduling of observations. Our work a ...
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Journal articleThe Journal of infectious diseases · April 2011
Recently, the RV144 randomized, double-blind, efficacy trial in Thailand reported that a prime-boost human immunodeficiency virus (HIV) vaccine regimen conferred ∼30% protection against HIV acquisition. However, different analyses seemed to give conflictin ...
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Journal articleAnnals of Statistics · October 1, 2010
This paper studies the multiplicity-correction effect of standard Bayesian variable-selection priors in linear regression. Our first goal is to clarify when, and how, multiplicity correction happens automatically in Bayesian analysis, and to distinguish th ...
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Journal articleBayesian Analysis · December 1, 2009
Bayesian analysis incorporates different sources of information into a single analysis through Bayes theorem. When one or more of the sources of information are suspect (e.g., if the model assumed for the information is viewed as quite possibly being signi ...
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Journal articleWiley Interdisciplinary Reviews Computational Statistics · December 1, 2009
The Statistical and Applied Mathematical Sciences Institute (SAMSI) is a national institute in the USA devoted to forging a synthesis of the statistical sciences and the applied mathematical sciences with disciplinary science to confront the very hardest a ...
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Journal articleTechnometrics · November 1, 2009
Risk assessment of rare natural hazards, such as large volcanic block and ash or pyroclastic flows, is addressed. Assessment is approached through a combination of computer modeling, statistical modeling, and extreme-event probability computation. A comput ...
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Journal articleJournal of the American Statistical Association · October 14, 2009
The CRASH computer model simulates the effect of a vehicle colliding against different barrier types. If it accurately represents real vehicle crashworthiness, the computer model can be of great value in various aspects of vehicle design, such as the setti ...
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Journal articleAnnals of Statistics · April 1, 2009
Reference analysis produces objective Bayesian inference, in the sense that inferential statements depend only on the assumed model and the available data, and the prior distribution used to make an inference is least informative in a certain information-t ...
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Journal articleRevista De La Real Academia De Ciencias Exactas Fisicas Y Naturales Serie A Matematicas · January 1, 2009
The statistical analysis of a sample taken from a finite population is a classic problem for which no generally accepted objective Bayesian results seem to exist. Bayesian solutions to this problem may be very sensitive to the choice of the prior, and ther ...
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Journal articlePhystat Lhc Workshop on Statistical Issues for Lhc Physics Phystat 2007 Proceedings · December 1, 2008
This is a mostly philosophical discussion of approaches to statistical hypothesis testing, including p-values, classical frequentist testing, Bayesian testing, and conditional frequentist testing. We also briefly discuss the issue of multiplicity, an issue ...
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Journal articleComputer Methods in Applied Mechanics and Engineering · May 1, 2008
A major question for the application of computer models is Does the computer model adequately represent reality? Viewing the computer models as a potentially biased representation of reality, Bayarri et al. [M. Bayarri, J. Berger, R. Paulo, J. Sacks, J. Ca ...
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Journal articleAnnals of Statistics · April 1, 2008
Study of the bivariate normal distribution raises the full range of issues involving objective Bayesian inference, including the different types of objective priors (e.g., Jeffreys, invariant, reference, matching), the different modes of inference (e.g., B ...
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Journal articleJournal of the American Statistical Association · 2008
Zellner's g prior remains a popular conventional prior for use in Bayesian variable selection, despite several undesirable consistency issues. In this article we study mixtures of g priors as an alternative to default g priors that resolve many of the prob ...
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Journal articleAnnals of Statistics · October 1, 2007
A key question in evaluation of computer models is Does the computer model adequately represent reality? A six-step process for computer model validation is set out in Bayarri et al. [Technometrics 49 (2007) 138-154] (and briefly summarized below), based o ...
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Journal articleTechnometrics · May 1, 2007
We present a framework that enables computer model evaluation oriented toward answering the question: Does the computer model adequately represent reality? The proposed validation framework is a six-step procedure based on Bayesian and likelihood methodolo ...
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Journal articleBayesian Analysis · December 1, 2006
Bayesian statistical practice makes extensive use of versions of objective Bayesian analysis. We discuss why this is so, and address some of the criticisms that have been raised concerning objective Bayesian analysis. The dangers of treating the issue too ...
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Journal articleJournal of Statistical Planning and Inference · July 1, 2006
There has been increased interest of late in the Bayesian approach to multiple testing (often called the multiple comparisons problem), motivated by the need to analyze DNA microarray data in which it is desired to learn which of potentially several thousa ...
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Journal articleTechnometrics · November 1, 2005
CORSIM, a microsimulator for vehicular traffic, is being studied with respect to its ability to successfully model and predict behavior of traffic in a 36-block section of Chicago. Inputs to the simulator include information about street configuration, dri ...
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Journal articleStatistics and Probability Letters · July 15, 2005
A variety of pseudo-Bayes factors have been proposed, based on using part of the data to update an improper prior, and using the remainder of the data to compute the Bayes factor. A number of these approaches are of a bootstrap or cross-validation nature, ...
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Journal articleAnnals of Statistics · April 1, 2005
Hierarchical modeling is wonderful and here to stay, but hyperparameter priors are often chosen in a casual fashion. Unfortunately, as the number of hyperparameters grows, the effects of casual choices can multiply, leading to considerably inferior perform ...
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Journal articleStatistica Neerlandica · February 1, 2005
We focus on Bayesian model selection for the variable selection problem in large model spaces. The challenge is to search the huge model space adequately, while accurately approximating model posterior probabilities for the visited models. The issue of cho ...
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Journal articleAnnals of Statistics · June 1, 2004
Often the goal of model selection is to choose a model for future prediction, and it is natural to measure the accuracy of a future prediction by squared error loss. Under the Bayesian approach, it is commonly perceived that the optimal predictive model is ...
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Journal articleAnnals of Statistics · June 1, 2004
Central to several objective approaches to Bayesian model selection is the use of training samples (subsets of the data), so as to allow utilization of improper objective priors. The most common prescription for choosing training samples is to choose them ...
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Journal articleStatistical Science · February 1, 2004
Statistics has struggled for nearly a century over the issue of whether the Bayesian or frequentist paradigm is superior. This debate is far from over and, indeed, should continue, since there are fundamental philosophical and pedagogical issues at stake. ...
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Journal articleTransportation Research Record · January 1, 2004
Calibrating and validating a traffic simulation model for use on a transportation network depend on field data that are often limited but essential for determining inputs to the model and for assessing its reliability. Quantification and systemization of t ...
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Journal articleEnvironmetrics · September 1, 2003
Ozonesondes collect data relevant to ozone level at various altitudes. Modeling these data involves a combination of spatial and temporal modeling. The spatial component can be conveniently modeled as a four component mixture of normal distributions. The ( ...
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Journal articleAstrophysical Journal · July 20, 2003
We develop and describe a Bayesian statistical analysis to solve the surface brightness equations for Cepheid distances and stellar properties. Our analysis provides a mathematically rigorous and objective solution to the problem, including immunity from L ...
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Journal articleJournal of Statistical Planning and Inference · March 1, 2003
Stone (J. Roy. Statist. Soc. Ser. B 41 (1979) 276) showed that BIC can fail to be asymptotically consistent. Note, however, that BIC was developed as an asymptotic approximation to Bayes factors between models, and that the approximation is valid only unde ...
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Journal articleStatistical Science · February 1, 2003
Ronald Fisher advocated testing using p-values, Harold Jeffreys proposed use of objective posterior probabilities of hypotheses and Jerzy Neyman recommended testing with fixed error probabilities. Each was quite critical of the other approaches. Most troub ...
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Journal articleScandinavian Journal of Statistics · January 1, 2003
Testing of a composite null hypothesis versus a composite alternative is considered when both have a related invariance structure. The goal is to develop conditional frequentist tests that allow the reporting of data-dependent error probabilities, error pr ...
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Journal articleBiometrika · December 1, 2002
We consider the problem of comparing parametric models using a Bayesian approach. A new method of developing prior distributions for the model parameters is presented, called the expected-posterior prior approach. The idea is to define the priors for all m ...
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Journal articleJournal of the American Statistical Association · December 1, 2001
Spatially varying phenomena are often modeled using Gaussian random fields, specified by their mean function and covariance function. The spatial correlation structure of these models is commonly specified to be of a certain form (e.g., spherical, power ex ...
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Journal articleMedical decision making : an international journal of the Society for Medical Decision Making · November 2001
BackgroundSeveral medical articles discuss methods of constructing confidence intervals for single proportions and the likelihood ratio, but scant attention has been given to the systematic study of intervals for the posterior odds, or the positiv ...
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Journal articleJournal of the American Statistical Association · March 1, 2001
Testing the fit of data to a parametric model can be done by embedding the parametric model in a nonparametric alternative and computing the Bayes factor of the parametric model to the nonparametric alternative. Doing so by specifying the nonparametric alt ...
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Journal articleAmerican Statistician · February 1, 2001
P values are the most commonly used tool to measure evidence against a hypothesis or hypothesized model. Unfortunately, they are often incorrectly viewed as an error probability for rejection of the hypothesis or, even worse, as the posterior probability t ...
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Journal articleJournal of the American Statistical Association · December 1, 2000
The problem of investigating compatibility of an assumed model with the data is investigated in the situation when the assumed model has unknown parameters. The most frequently used measures of compatibility are p values, based on statistics T for which la ...
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Journal articleComputational Statistics and Data Analysis · June 28, 2000
Standard Bayesian inferences concerning a normal mean are considered when, for robustness reasons, Cauchy prior distributions are utilized. The inferences considered include testing a point null hypothesis, one-sided testing, estimation, and credible sets. ...
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Journal articleJournal of the American Statistical Association · June 1, 1999
Bayesian hypothesis testing for nonnested hypotheses is studied, using various “default” Bayes factors, such as the fractional Bayes factor, the median intrinsic Bayes factor, and the encompassing and expected intrinsic Bayes factors. The different default ...
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Journal articleStatistical Science · January 1, 1999
Elimination of nuisance parameters is a central problem in statistical inference and has been formally studied in virtually all approaches to inference. Perhaps the least studied approach is elimination of nuisance parameters through integration, in the se ...
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Journal articleStatistica Sinica · April 1, 1998
The estimation of quadratic functions of a multivariate normal mean is an inferential problem which, while being simple to state and often encountered in practice, leads to surprising complications both from frequentist and Bayesian points of view. The dra ...
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Journal articleAnnals of Statistics · January 1, 1998
Selection models arise when the data are selected to enter the sample only if they occur in a certain region of the sample space. When this selection occurs according to some probability distribution, the resulting model is often instead called a weighted ...
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Journal articleBiometrika · January 1, 1998
In this paper, reference priors are derived for three cases where partial information is available. If a subjective conditional prior is given, two reasonable methods are proposed for finding the marginal reference prior. If, instead, a subjective marginal ...
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Journal articleStatistical Science · January 1, 1997
In this paper, we show that the conditional frequentist method of testing a precise hypothesis can be made virtually equivalent to Bayesian testing. The conditioning strategy proposed by Berger, Brown and Wolpert in 1994, for the simple versus simple case, ...
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Journal articleJournal of the American Statistical Association · March 1, 1996
In the Bayesian approach to model selection or hypothesis testing with models or hypotheses of differing dimensions, it is typically not possible to utilize standard noninformative (or default) prior distributions. This has led Bayesians to use conventiona ...
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Journal articleAnnals of Statistics · January 1, 1996
In hierarchical Bayesian modeling of normal means, it is common to complete the prior specification by choosing a constant prior density for unmodeled hyperparameters (e.g., variances and highest-level means). This common practice often results in an inade ...
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Journal articleAnnals of Operations Research · December 1, 1995
Solving Bayesian decision problems usually requires approximation procedures, all leading to study the convergence of the approximating infima. This aspect is analysed in the context of epigraphical convergence of integral functionals, as minimal context f ...
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Journal articleFoundations of Science · March 1, 1995
While results from statistical modelling too often receive blind acceptance, we question whether there is any real alternative to use of modelling. This does not diminish the main point of Professor Freedman, which is that healthy scepticism towards models ...
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Journal articleAnnals of the Institute of Statistical Mathematics · June 1, 1994
Assume that the probability density function for the lifetime of a newly designed product has the form: [H′(t)/Q(θ)] exp{-H(t)/Q(θ)}. The Exponential ε(θ), Rayleigh, Weibull W(θ, β) and Pareto pdf's are special cases. Q(θ) will be assumed to have an invers ...
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Journal articleTest · June 1, 1994
Robust Bayesian analysis is the study of the sensitivity of Bayesian answers to uncertain inputs. This paper seeks to provide an overview of the subject, one that is accessible to statisticians outside the field. Recent developments in the area are also re ...
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Journal articleJournal of Statistical Planning and Inference · January 1, 1994
Robust Bayesian testing of point null hypotheses is considered for problems involving the presence of nuisance parameters. The robust Bayesian approach seeks answers that hold for a range of prior distributions. Three techniques for handling the nuisance p ...
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Journal articleJournal of Statistical Planning and Inference · January 1, 1994
When θ is a multidimensional parameter, the issue of prior dependence or independence of coordinates is a serious concern. This is especially true in robust Bayesian analysis; Lavine et al. (J. Amer. Statist. Assoc. 86, 964-971 (1991)) show that allowing a ...
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Journal articleStatistics and Probability Letters · December 2, 1993
In robust Bayesian analysis, it is of interest to find the optimal robust credible set, viz: the smallest set with posterior probability at least, say γ, with respect to each prior in the class. Here, we derive the optimal robust credible set for the ε-con ...
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Journal articleBiometrika · March 1, 1992
SUMMARY: Noninformative priors are developed, using the reference prior approach, for multipara-meter problems in which there may be parameters of interest and nuisance parameters. For a given grouping of parameters and ordering of the groups, intuitively, ...
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Journal articleJournal of the Italian Statistical Society · February 1, 1992
Robust Bayesian analysis deals simultaneously with a class of possible prior distributions, instead of a single distribution. This paper concentrates on the surprising results that can be obtained when applying the theory to problems of testing precise hyp ...
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Journal articleBiometrika · September 1, 1991
SUMMARY: In the exponential regression model, inference concerning the regression parameter is notoriously difficult, even when using the Bayesian noninformative prior approach. The reference prior approach (Bernardo, 1979; Berger & Bernardo, 1989) is cons ...
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Journal articleJournal of Statistical Planning and Inference · January 1, 1991
The i-th member of a group of m individuals (or stations) observes a random quantity Xi, where X=(X1,...,Xm) has a density g(x |π). Each individual can report only yi=hi(xi), because of a li ...
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Journal articleStatistics and Probability Letters · January 1, 1990
It is observed that unbiased estimators are always inadmissible when the parameter (or function of the parameter) being estimated has either a maximum or a minimum at a parameter value for which the probability distribution is nondegenerate. Examples of pr ...
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Journal articleJournal of Statistical Planning and Inference · January 1, 1989
In estimation of a p-variate normal mean with identify covariance matrix, confidence sets recentered at Stein-type estimators have larger coverage probability then the usual confidence ellipsoids (see Hwang and Casella (1982)). However, the minimum coverag ...
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Journal articleStatistical Science · January 1, 1987
Testing of precise (point or small interval) hypotheses is reviewed, with special emphasis placed on exploring the dramatic conflict between conditional measures (Bayes factors and posterior probabilities) and the classical P-value (or observed significanc ...
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Journal articleJournal of the American Statistical Association · January 1, 1987
The problem of testing a point null hypothesis (or a “small interval” null hypothesis) is considered. of interest is the relationship between the P value (or observed significance level) and conditional and Bayesian measures of evidence against the null hy ...
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Journal articleJournal of Econometrics · January 1, 1984
The relationship between Stein estimation of a multivariate normal mean and Bayesian analysis is considered. The necessity to involve prior information is discussed, and the various methods of so doing are reviewed. These include direct Bayesian analyses, ...
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Journal articleJournal of Statistical Planning and Inference · January 1, 1983
The problem of combining coordinates in Stein-type estimators, when simultaneously estimating normal means, is considered. The question of deciding whether to use all coordinates in one combined shrinkage estimator or to separate into groups and use separa ...
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Journal articleJournal of Multivariate Analysis · January 1, 1983
The problem of global estimation of the mean function θ(·) of a quite arbitrary Gaussian process is considered. The loss function in estimating θ by a function a(·) is assumed to be of the form L(θ, a) = ∫ [θ(t) - a(t)]2μ(dt), and estimators are ...
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Journal articleJournal of Multivariate Analysis · January 1, 1978
Let X be an observation from a p-variate (p ≥ 3) normal random vector with unknown mean vector θ and known covariance matrix {A figure is presented}. The problem of improving upon the usual estimator of θ, δ0(X) = X, is considered. An approach i ...
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Journal articleJournal of Multivariate Analysis · January 1, 1976
Let X be a p-variate (p ≥ 3) vector normally distributed with mean θ and known covariance matrix {A figure is presented}. It is desired to estimate θ under the quadratic loss (δ - θ)t Q(δ - θ), where Q is a known positive definite matrix. A broa ...
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