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作者:Dette, H; Röder, I
作者单位:Ruhr University Bochum; Ruhr University Bochum; Leipzig University
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作者:Dümbgen, L
作者单位:Ruprecht Karls University Heidelberg; University of Lubeck
摘要:Suppose one observes a process V on the unit interval, where dV = f(o)+ dW with an unknown parameter f(o) epsilon L-1[0, 1] and standard Brownian motion W. We propose a particular test of one-point hypotheses about f(o) which is based on suitably standardized increments of V. This test is shown to have desirable consistency properties if, for instance, f(o) is restricted to various Holder classes of functions. The test is mimicked in the context of nonparametric density estimation, nonparametr...
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作者:Ling, SQ; Li, WK
作者单位:University of Hong Kong
摘要:This paper investigates the maximum likelihood estimator (MLE) for unstable autoregressive moving-average (ARMA) time series with the noise sequence satisfying a general autoregressive heteroscedastic (GARCH) process. Under some mild conditions, it is shown that the MLE satisfying the likelihood equation exists and is consistent. The limiting distribution of the RILE is derived in a unified manner for all types of characteristic roots on or outside the unit circle and is expressed as a functio...
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作者:Brown, LD; Zhang, CH
作者单位:University of Pennsylvania; Rutgers University System; Rutgers University New Brunswick
摘要:An example is provided to show that the natural asymptotic equivalence does not hold between any pairs of three nonparametric experiments: density problem, white noise with drift and nonparametric regression, when the smoothness index of the unknown nonparametric function class is 1/2.
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作者:Koo, JY; Chung, HY
作者单位:Hallym University
摘要:We estimate a probability density function p which is related by a linear operator K to a density function q in sequences of regular exponential families based on a random sample from q. In this paper deconvolution and positron emission tomography are considered. The logarithm of the density Function is approximated by basis functions consisting of singular functions of K. While direct maximum likelihood (or minimum Kullback-Leibler) density estimation in exponential families selects the param...
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作者:Bühlmann, P
作者单位:Swiss Federal Institutes of Technology Domain; ETH Zurich
摘要:We propose a sieve bootstrap procedure for time series with a deterministic trend. The sieve for constructing the bootstrap is based on nonparametric trend estimation and autoregressive approximation for some noise process. The bootstrap scheme itself does i.i.d, resampling of estimated innovations from fitted autoregressive models. We show the validity and indicate second-order correctness of such sieve bootstrap approximations for the limiting distribution of nonparametric linear smoothers. ...
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作者:Wang, JL; Müller, HG; Capra, WB
作者单位:University of California System; University of California Davis
摘要:This paper provides a data analysis and some methodological advances which contribute to an ongoing scientific debate about the patterns of aging. One of the problems we address is how to estimate a hazard function when only aggregated information on the lifetimes in the form of a lifetable is available. This problem affects the estimation of oldest-old mortality which in turn plays an important role in the quantification of biological lifespan and longevity. We illustrate these issues with an...