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作者：Binder, DA
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作者：Goutis, C; Fearn, T
作者单位：University of London; University College London
摘要：In this article we present a modification of partial least squares regression to account for inherent nonexchangeabilities of the columns of the design matrix. In chemometrics applications it is common to write the matrix as a bilinear form of latent variables and loadings. These loadings are often interpreted as sampled values of functions; hence they should exhibit a degree of smoothness. Our method forces the partial least squares factors to be smooth, by using a roughness penalty motivated...
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作者：Kosorok, MR; Chao, WH
作者单位：University of Wisconsin System; University of Wisconsin Madison
摘要：A simple Markov model is developed for assessing the predictive effect of time-dependent covariates on an intermittently observed ordinal response in continuous time. This is accomplished by reparameterizing an ergodic intensify matrix in terms of its equilibrium distribution and a parametrically independent component that assesses the rate of movement between ordinal categories. The effect of covariates on the equilibrium distribution can then be modeled using any link appropriate for ordinal...
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作者：Rubin, DB
摘要：Multiple imputation was designed to handle the problem of missing data in public-use data bases where the data-base constructor and the ultimate user are distinct entities. The objective is valid frequency inference for ultimate users who in general have access only to complete-data software and possess limited knowledge of specific reasons and models for nonresponse. For this situation and objective, I believe that multiple imputation by the data-base constructor is the method of choice. This...
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作者：Solna, K; Switzer, P
摘要：We discuss a framework for estimation of temporal trend for an evolving spatial field. The spatial field is regularly sampled in time at arbitrary monitoring locations whose position may change over time. The estimation of time trend and the quantification of estimation error derives from a probabilistic model. We illustrate with an example involving the surface temperature field in the steppe region of eastern Europe.
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作者：Carota, C; Parmigiani, G; Polson, NG
作者单位：Duke University; University of Chicago
摘要：We discuss the problem of model criticism, with emphasis on developing summary diagnostic measures. We approach model criticism by identifying possible troublesome features of the currently entertained model, embedding the model in an elaborated model, and measuring the value of elaborating. This requires three elements: a model elaboration,a prior distribution, and a utility function. Each tripler generates a different diagnostic measure. We focus primarily on the measure given by a Kullback-...
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作者：Fan, JQ
摘要：Traditional nonparametric tests, such as the Kolomogorov-Smirnov test and the Cramer-Von Mises test, are based on the empirical distribution functions. Although these tests possess root-n consistency, they effectively use only information contained in the low frequencies. This leads to low power in detecting fine features such as sharp and short aberrants as well as global features such as high-frequency alternations. The drawback can be repaired via smoothing-based test statistics. In this ar...
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作者：OSullivan, F; Pawitan, Y
作者单位：University College Dublin
摘要：Motivated by a number of practical applications, we consider a class of indirect nonparametric density estimation problems in which the observed data consist of a histogram of binned empirically corrected counts. Due to variability in the process of correction, the histogram cannot be modeled in terms of simple scaled Poisson statistics. This departure necessitates the development of a new methodology or bandwidth selection. A variant of the method of unbiased risk estimation is proposed. The ...
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作者：Golan, A; Judge, G; Perloff, JM
摘要：The classical maximum entropy (ME) approach to estimating the unknown parameters of a multinomial discrete choice problem, which is equivalent to the maximum likelihood multinomial logit (ML) estimator, is generalized. The generalized maximum entropy (GME) model includes noise terms in the multinomial information constraints. Each noise term is modeled as the mean of a finite set of a priori known points in the interval [-1, 1] with unknown probabilities where no parametric assumptions about t...
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作者：Treder, RP; Sedransk, J
作者单位：University System of Ohio; Case Western Reserve University
摘要：We propose a sequential two-phase sample design to accommodate applications where conventional two-phase sampling cannot be used. First, we derive the optimal, the optimal myopic, and several approximate optimal myopic sequential decision procedures for subsampling a first-phase sample. Then we compare our procedure to that of the optimal (nonsequential) conventional two-phase sample design. In our application, the objective is inference about the age distribution of a population of fish using...
