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作者：RUDOLFER, SM
摘要：This paper studies the properties of a {0,1}-state Markov chain model of extrabinomial variation. If n is even, the Markov chain binomial model is always overdispersed relative to the binomial model with parameters n and p, while if n is odd, it may be over- or underdispersed relative to the binomial model. Expressions for the likelihood and variance functions are obtained, and for n = 3, the Markov chain binomial model is compared with the additive and multiplicative binomial models of Altham...
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作者：LIPSITZ, SR; LAIRD, NM; HARRINGTON, DP
摘要：Suppose that a homogeneous group of n subjects is observed on T occasions. Each subject has one of K levels of response at each of the T occasions. The cross-classification of the recorded responses over time forms a KT contingency table. This paper discusses the design matrix for the marginal homogeneity model, which assumes that the first-order marginal probabilities at each time are equal. The marginal homogeneity model is a linear model for the vector of cell probabilities. We obtain the d...
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作者：TAWN, JA
摘要：Multivariate extreme value distributions arise as the limiting joint distribution of normalized componentwise maxima/minima. No parametric family exists for the dependence between the margins. This paper extends to more than two variables the models and results for the bivariate case obtained by Tawn (1988). Two new families of physically motivated parametric models for the dependence structure are presented and are illustrated with an application to trivariate extreme sea level data.
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作者：KUK, AYC
摘要：We propose a new method for conducting surveys on sensitive topics which does not require direct answers from the respondents. It overcomes some of the difficulties associated with traditional randomized response techniques and is applicable to both qualitative and quantitative characteristics. Data collected using the proposed method are distributed according to a mixture distribution and the problem reduces to that of estimating a mixing proportion or a mixing distribution. The method can be...
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作者：MANGAT, NS; SINGH, R
作者单位：Punjab Agricultural University
摘要：The paper considers a new randomized response procedure. The proposed method requires the use of two randomization devices. The conditions when the proposed strategy will be more efficient than the usual Warner''s strategy have been obtained for the cases when the respondents are truthful and when they are not completely truthful in their answers.
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作者：WEI, LJ; SU, JQ; LACHIN, JM
作者单位：George Washington University
摘要：In comparing two treatments, suppose that patients are available for the study sequentially. Repeated measurements of the same characteristic are collected serially over time for each study patient. Sequential procedures are proposed to monitor the trial for early evidence of treatment difference or harmful side effects based on such repeated measurements. All the methods are illustrated with a real-life example.
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作者：DARROCH, JN; MCCLOUD, PI
作者单位：Monash University
摘要：Two or more responses measured on a randomly selected individual can be dependent for two quite different reasons. In the first place they can be dependent within, that is conditional upon, each individual. Secondly, dependence is created simply from the heterogeneity between individuals. This paper addresses a rare instance of being able to measure separately the dependence from the two sources. The data comprise frequencies of the infection profiles for a sample of individuals exposed to fou...
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作者：STERN, H
摘要：An approach to building models for paired comparisons experiments based on comparisons of gamma random variables is considered. The probability that one object is preferred to a second object is taken to be the probability that one gamma random variable with shape parameter r is less than a second independent gamma random variable with the same shape parameter but a different scale parameter. This is motivated by considering a point scoring competition as the basis for each period comparison. ...
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作者：RAO, JNK; KOVAR, JG; MANTEL, HJ
作者单位：Statistics Canada
摘要：Ratio and difference estimators of a population distribution function under a general sampling design are obtained, using auxiliary population information. The relative mean errors and relative mean square errors of these estimators and a model-based estimator of Chambers and Dunstan (1986) are compared through a simulation study. The advantages of the design-based estimators over the model-based estimator under model misspecifications, especially for large samples, are demonstrated. Ratio and...
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作者：FONG, WK
摘要：To study time-dependent characteristics of a population, we may sample the same population at regular intervals. A basic problem is how the sample should be selected at different time periods. Here we consider successive sampling with partial replacement of units on two occasions from a Bayesian point of view. Bayes estimators and optimal designs for such priors will be obtained. In one situation, the whole survey, i.e. the first sample and the second sample, is planned before the first time p...
