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61.
62.
In this work a new type of logits and odds ratios, which includes as special cases the continuation and the reverse-continuation
logits and odds ratios, are defined. We prove that these logits and odds ratios define a parameterization of the joint probabilities
of a two way contingency table. The problem of testing equality and inequality constraints on these logits and odds ratios
is examined with particular regard to two new hypotheses of monotone dependence.
Work partially supported by a MIUR2004 grant. Preliminary findings have been presented at SIS (Società Italiana di Statistica)
Annual Meeting, Torino, 2006. 相似文献
63.
ABSTRACTA quantile autoregresive model is a useful extension of classical autoregresive models as it can capture the influences of conditioning variables on the location, scale, and shape of the response distribution. However, at the extreme tails, standard quantile autoregression estimator is often unstable due to data sparsity. In this article, assuming quantile autoregresive models, we develop a new estimator for extreme conditional quantiles of time series data based on extreme value theory. We build the connection between the second-order conditions for the autoregression coefficients and for the conditional quantile functions, and establish the asymptotic properties of the proposed estimator. The finite sample performance of the proposed method is illustrated through a simulation study and the analysis of U.S. retail gasoline price. 相似文献
64.
65.
Blest (2000, Aust. N. Z. J. Stat. 42 , 101–111) proposed a new measure of rank correlation that is sensitive to discrepancies in the small ranks. This paper investigates the efficiency properties of non‐parametric tests for independence based on Blest's correlation coefficient and its modifications. Pitman efficiency comparisons are made with analogous tests existing in the literature. Conditions for Pitman optimality of the Blest‐type tests are established. 相似文献
66.
Time series of counts occur in many fields of practice, with the Poisson distribution as a popular choice for the marginal process distribution. A great variety of serial dependence structures of stationary count processes can be modelled by the INARMA family. In this article, we propose a new approach to the INMA(q) family in general, including previously known results as special cases. In the particular case of Poisson marginals, we will derive new results concerning regression properties and the serial dependence structure of INAR(1) and INMA(q) models. Finally, we present explicit expressions for the distribution of jumps in such processes. 相似文献
67.
In system reliability studies a common problem is the coherent assessment of system reliability, based on generic database information from components and on failure data from a system and its components in a common, but unknown, environment. A solution to this problem is given. 相似文献
68.
农村社会养老保险制度变迁路径依赖及创新 总被引:15,自引:0,他引:15
在农村传统养老保障制度安排出现不均衡的情况下 ,我国政府从 2 0世纪 80年代中期开始推行农村社会养老保险制度改革。然而 ,由于新供给制度的路径受初始制度安排的影响 ,制度变迁显示出强烈的路径依赖特征。如何退出这种非绩效的闭锁状态 ,是建立现代农村社会养老保险制度的关键。 相似文献
69.
Dong Wan Shin 《Statistics》2015,49(1):209-223
Stationary bootstrapping is applied to panel cointegration tests which are based on the ordinary least-squares estimator and the seemingly unrelated regression (SUR) estimator of the residual unit root. Large sample validity of stationary bootstrapping is established. A finite sample experiment reveals that size performances of the bootstrap tests are much less sensitive to cross-sectional correlation than those of existing tests and a test based on the SUR estimator has substantially better power than existing tests. 相似文献
70.
周德仓 《西藏民族学院学报》2004,25(1):28-32,48
本文以实地考察和解读文献资料相结合的方式,近距离、多视角地运载西藏当前新闻传播的整体状况做出基本梳理和评价,对其作为民族区域新闻传播事业的价值、经验和缺陷进行了宏观把握.文章的资料性和理性评判,对西藏新闻传播事业的发展和研究具有参考价值. 相似文献