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作者:STUTE, W; WANG, JL
作者单位:University of California System; University of California Davis
摘要:Let X1, X2, ... be a sequence of i.i.d. random variables with d.f. F. We Observe Z(i) = min(X(i), Y(i)) and delta(i) = 1(Xi less-than-or-equal-to Yi), where Y1, Y2, ... is a sequence of i.i.d. censoring random variables. Denote by F(n) the Kaplan-Meier estimator of F. We show that for any F-integrable function phi, integral phi dF(n) converges almost surely and in the mean. The result may be applied to yield consistency of many estimators under random censorship.
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作者:DAWID, AP; WANG, JL
作者单位:East China Normal University
摘要:We investigate the problem of fiducial prediction for unobserved quantities within the framework of the functional model described previously by Dawid and Stone. It is supposed that these are related to a completely unknown parameter by means of a regular functional model, and that the observations are either given as known functions of the predictands, or are themselves related to them by means of a functional model. We develop algebraic conditions which allow the application of fiducial logi...
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作者:MAGULURI, G
摘要:Clayton's model for association in bivariate survival data is both of intrinsic importance and an interesting example of a semiparametric estimation problem, that is, a problem where inference about a parameter is required in the presence of nuisance functions. The joint distribution of the two survival times in this model is absolutely continuous and a single parameter governs the association between the two survival times. In this paper we describe an algorithm to derive the asymptotic lower...
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作者:BOOTH, JG; HALL, P
作者单位:Australian National University; Commonwealth Scientific & Industrial Research Organisation (CSIRO)
摘要:In a recent paper, C. F. J. Wu showed that the jackknife estimator of a distribution function has optimal convergence rate O(n-1/2), where n denotes the sample size. This rate is achieved by retaining O(n) data values from the original sample during the jackknife algorithm. Wu's result is particularly important since it permits a direct comparison of jackknife and bootstrap methods for distribution estimation. In the present paper we show that a very simple, nonempirical modification of the ja...
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作者:KURIKI, S
摘要:Let H and G be independently distributed according to the Wishart distributions W(m)(M, PHI) and W(m)(N, PSI), respectively. We derive the limiting null distributions of the likelihood ratio criteria for testing H-0: PHI = PSI against H-1 - H-0 with H-1: PHI greater-than-or-equal-to PSI; and for testing H-0(R): PHI greater-than-or-equal-to PSI rank(PHI - PSI) less-than-or-equal-to R (for given R) against H-1 - H-0(R). They are particular cases of the chi-bar-squared distributions.