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41.
Sexual status and psychiatric symptoms 总被引:8,自引:0,他引:8
42.
A research note on diagnosed mental illness and social class 总被引:1,自引:0,他引:1
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There is an emerging consensus in empirical finance that realized volatility series typically display long range dependence with a memory parameter (d) around 0.4 (Andersen et al., 2001; Martens et al., 2004). The present article provides some illustrative analysis of how long memory may arise from the accumulative process underlying realized volatility. The article also uses results in Lieberman and Phillips (2004, 2005) to refine statistical inference about d by higher order theory. Standard asymptotic theory has an O(n ?1/2) error rate for error rejection probabilities, and the theory used here refines the approximation to an error rate of o(n ?1/2). The new formula is independent of unknown parameters, is simple to calculate and user-friendly. The method is applied to test whether the reported long memory parameter estimates of Andersen et al. (2001) and Martens et al. (2004) differ significantly from the lower boundary (d = 0.5) of nonstationary long memory, and generally confirms earlier findings. 相似文献
46.
In this paper we provide a comprehensive Bayesian posterior analysis of trend determination in general autoregressive models. Multiple lag autoregressive models with fitted drifts and time trends as well as models that allow for certain types of structural change in the deterministic components are considered. We utilize a modified information matrix-based prior that accommodates stochastic nonstationarity, takes into account the interactions between long-run and short-run dynamics and controls the degree of stochastic nonstationarity permitted. We derive analytic posterior densities for all of the trend determining parameters via the Laplace approximation to multivariate integrals. We also address the sampling properties of our posteriors under alternative data generating processes by simulation methods. We apply our Bayesian techniques to the Nelson-Plosser macroeconomic data and various stock price and dividend data. Contrary to DeJong and Whiteman (1989a,b,c), we do not find that the data overwhelmingly favor the existence of deterministic trends over stochastic trends. In addition, we find evidence supporting Perron's (1989) view that some of the Nelson and Plosser data are best construed as trend stationary with a change in the trend function occurring at 1929. 相似文献
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Robert F. Phillips 《统计学通讯:模拟与计算》2013,42(2):705-720
This paper shows that by minimizing a Chebychev norm a mixing distribution can be constructed which converges weakly to the true mixing distribution with probability one. Deely and Kruse (1968) established a similar result for the supremum norm. For both norms the constructed mixing distribution is computed by solving a linear programming problem, but this problem is considerably smaller when the Chebychev norm is used. Thus a suitable mixing distribution can be constructed from solving a linear programming problem with considerably less computational work than was previously known. To illustrate the application of this simpler procedure it is applied to derive nonparametric empirical Bayes estimates in a simulation study. Some density estimates are also illustrated. 相似文献
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ABSTRACTThis paper illustrates the development of a secondment project designed to enhance practitioner-led social work education in a Higher Education Institution. The project was developed as part of a Teaching Partnership initiative to establish joint working and standardized approaches to social work education between Higher Education Institutes and Local Authorities across a UK region. Highlighted is how the project utilized a six-stage strategy designed to gather information to produce an evidence-base to support the implementation of a pilot practitioner secondment arrangement. The paper discusses strategies used to gather information from a range of stakeholders to inform the project, the project outcome and some considerations for future secondment arrangements. Contributing to a limited source of literature, challenges and limitations of developing formal secondment arrangements and delivering practitioner-led education in Higher Education Institutes are highlighted. This paper will assist Higher Education Institutes and Local Authorities in the design and implementation of formal secondment arrangements where these are identified as in need of development. 相似文献
50.
James E. Carr Melissa R. Nosik Sarah A. Lechago Lauren Phillips 《The Analysis of verbal behavior》2015,31(1):3-9
This annotated bibliography summarizes journal articles on verbal behavior published outside of The Analysis of Verbal Behavior, the primary journal for scholarship in this area. Seventeen such articles were published in 2014 and are annotated as a resource for practitioners, researchers, and educators. 相似文献