On shrinkage least squares estimation in a parallelism problem

In a multi-sample simple regression model, generally, homogeneity of the regression slopes leads to improved estimation of the intercepts. Analogous to the preliminary test estimators, (smooth) shrinkage least squares estimators of Intercepts based on the James-Stein rule on regression slopes are considered. Relative pictures on the (asymptotic) risk of the classical, preliminary test and the shrinkage least squares estimators are also presented. None of the preliminary test and shrinkage least squares estimators may dominate over the other, though each of them fares well relative to the other estimators.     

On a nonparametric test for the mixed-model

Nonparametric tests for the null hypothesis of no treatment effect in the mixed-model experiment which involves n randomly chosen subjects who respond once to each of ρ distinct treatments have been developed by Koch and Sen (1968), These tests were based on the assumption of compound symmetry of the error vectors and on the weaker assumption of diagonal symmetry of the error vectors. This paper considers an alternative (permutationally) distribution-free test under this latter assumption. The new test follows the same type of distribution theory as those in Koch and Sen, but utilizes the inherent invariance structure in a more visable and direct way.     

Asymptotic equivalence of the harrell-davis median estimator and the sample median

This paper presents an asymptotic equivalence result with a sharp rate of convergence forthe sample median and the Harrell-Davis median estimator. The consequences of this result are discussed.     

On shrinkage m-estimators of location parameters

For a general class of continuous ( and marginally symmetric ) inultivariate distributions, based on suitable M-statistics ( involving bounded but possibly discontinuous score generating functions), shrinkage estimators of location are considered. These estimators are based on the James-Stein type rule and incorporates the idea of preliminary test estimation too. The main emphasis is laid on the study of asymptotic tdistributional ) risk properties of these est-innators, and asymptotic tin-) adraissibility results are also studied under fairly general regularity conditions.     

Bayes estimators of the average failure rates

In the present paper we have proposed a Bayesian approach for making inferences from accelerated life tests which do not require distributional assumptions     

Nonparametric Tests for Stratum Effects in the Cox Model

Thispaper considers the stratified proportional hazards model witha focus on the assessment of stratum effects. The assessmentof such effects is often of interest, for example, in clinicaltrials. In this case, two relevant tests are the test of stratuminteraction with covariates and the test of stratum interactionwith baseline hazard functions. For the test of stratum interactionwith covariates, one can use the partial likelihood method (Kalbfleischand Prentice, 1980; Lin, 1994). For the test of stratum interactionwith baseline hazard functions, however, there seems to be noformal test available. We consider this problem and propose aclass of nonparametric tests. The asymptotic distributions ofthe tests are derived using the martingale theory. The proposedtests can also be used for survival comparisons which need tobe adjusted for covariate effects. The method is illustratedwith data from a lung cancer clinical trial.     

我国地方食品安全监管体系研究——以江苏省为例

食品安全一直是每个国民心中的中国梦。随着政府机构改革对食品安全问题的日益重视,新的监管体系正在形成。而地方政府作为国家食品安全监管的具体执行者,其所处的地位、所承担的责任、所拥有的权限决定了它是整个监管工作的关键。本文通过对江苏省食品安全监管体系的研究,尝试提出解决食品安全监管问题的建议。     

《政治经济学批判大纲》的哲学性质

在马克思主义哲学的创立过程中,恩格斯的《政治经济学批判大纲》具有特殊的地位和作用。就其哲学的性质,中外哲学界存在着许多不同的看法,这些不同的看法,直接影响着人们对马克思主义哲学的实质的理解。我们认为,恩格斯在《政治经济学批判大纲》中所表现出的哲学立场,一方面表明他完成了从唯心主义向唯物主义的根本转变,另一方面也表明,恩格斯此时的哲学世界观还停留在"费尔巴哈派"的阶段。     

灵活就业流动人口养老保险服务研究——基于社会融合视角

户籍制度引致的城乡二元结构让灵活就业流动人口难以真正融入城市公共服务体系,也给养老保险扩面工作带来困难。区别于既有研究侧重于流动人口养老保险政策和制度的调整,并基于经济融合、心理融合、社会接纳三个社会融合的维度,我们对浙江、四川进行了专项调研,分析了灵活就业流动人口参加社会养老保险意愿不高的原因,发现缴费能力低、城市归属感不强、就业地政策排斥是制约该群体在城市长期居留和养老参保的主要因素。为此,政府应着力提升该人群的个体人力资本,搭建社区交流平台,拓宽其社会融合的意见表达渠道,进而推动养老保险扩面服务。     

网页制作技巧

本文主要介绍在网页制作过程中经常使用的一些技巧,这些技巧的掌握对网络课程中 制作网页有一定的帮助作用。