ASYMPTOTIC TESTS FOR GROWTH CURVE MODELS WITH AUTOREGRESSIVE ERRORS

This paper presents the limit distribution (as the number of time points increase) for the score vector of a growth curve model assuming both stationary and explosive autoregressive (A.R.) errors. Limit distributions of the score statistic and the likelihood-ratio statistic for testing composite hypotheses about the regression parameters of several growth curves, when the autocorrelation parameters are treated as nuisance parameters, are presented.     

Power comparisons of single-sample winsorized T,trimmed T and student's T

The objective of this study is to evaluate the performance of Winsorized t which was proposed to be used as one alternative to the student's t statistic when the parent population is non-normal. The criterion we use is the power of the test. Comparative performance of the Winsorized t, trimmed t, and Studen$tCs t for normal populations and for Studen$tCs t distribution with 8, 4, and 2 degrees of freedom was investigated.     

ROUTES TO HIGHER-ORDER ACCURACY IN PARAMETRIC INFERENCE

Developments in the theory of frequentist parametric inference in recent decades have been driven largely by the desire to achieve higher-order accuracy, in particular distributional approximations that improve on first-order asymptotic theory by one or two orders of magnitude. At the same time, much methodology is specifically designed to respect key principles of parametric inference, in particular conditionality principles. Two main routes to higher-order accuracy have emerged: analytic methods based on 'small-sample asymptotics', and simulation, or 'bootstrap', approaches. It is argued here that, of these, the simulation methodology provides a simple and effective approach, which nevertheless retains finer inferential components of theory. The paper seeks to track likely developments of parametric inference, in an era dominated by the emergence of methodological problems involving complex dependences and/or high-dimensional parameters that typically exceed available data sample sizes.     

Extensions of empirical likelihood and chi-squared-based tests for ordered alternatives

Several methods for comparing k populations have been proposed in the literature. These methods assess the same null hypothesis of equal distributions but differ in the alternative hypothesis they consider. We focus on two important alternative hypotheses: monotone and umbrella ordering. Two new families of test statistics are proposed, including two known tests, as well as two new powerful tests under monotone ordering. Furthermore, these families are adapted for testing umbrella ordering. We compare some members of the families with respect to power and Type I errors under different simulation scenarios. Finally, the methods are illustrated in several applications to real data.     

本科毕业论文引文分析

以提高高等院校文献信息资源建设的科学性和文献现代资源利用率为目的 ,采用文献计量学的基本理论与方法 ,对天津大学信息工程学院的微电子专业 (1993— 1997年 ) ,本科毕业论文的引文量、引文文种、引文年代及引文半衰期等 ,进行了统计分析。结果显示 ,该读者群对各类型文献利用率 :中文文献占 5 2 .1% ,外文文献占 4 6 .6 %……分析结果表明 ,高校文献保障机构应重视、调整不同类型文献资源的收藏比例 ,同时 ,本科生应强化对外文文献资源的查询与利用能力     

新时期国内美国教育研究的考察——基于2000—2009年三种中文核心期刊的分析

本文搜集了2000—2009年发表在三家中文核心期刊上美国教育研究的所有论文,从研究时段、研究对象和研究领域等方面进行了统计分析。研究结果显示：国内美国教育研究领域全面拓展,研究的深度和系统性都有极大的增强,研究者们具有较强的时代意识和现实问题研究取向。研究的热点和重点仍然集中在教育管理、高等教育等方面;越来越多的研究者将教育学科与其他学科相结合,新型交叉学科研究呈现强劲发展势头;对教育的反思呈上升态蛰：教育史肇科研究有待增强。     

我国留守家庭状况的统计研究

对我国留守家庭的研究基于2000年全国人口普查0.95‰抽样数据。研究结果表明,留守家庭已经成为我国社会转型时期的重要家庭类型,其主要特征是家庭结构的变异和家庭功能的弱化。     

1998—2002年林业科技期刊的引文统计分析

引文统计分析是文献计量学的一个重要方法。该文以 1998— 2 0 0 2年《林业科学》等 17种林业科技期刊所载引文为统计对象 ,分别对引文率、引文类型、引文语种、出版社、林业学科半衰期等统计数据进行分析研究 ,总结出我国林业科技文献的引文率、引文类型、引文语种、出版社、半衰期的一些特点和规律 ,为林业科技文献研究和图书馆馆藏文献建设提供依据和参考     

基于资源和管理的技术创新能力的定义和统计分析

从能力的基本定义和实质出发, 从技术创新资源和技术创新管理的角度提出了制造业企业技术创新能力的定义, 并建立了评价指标。使用非参数统计方法证明了企业所拥有的技术创新资源及其管理水平共同决定了技术创新能力的大小, 提出了资源是基础, 管理是合理配置资源的过程, 资源和管理必须协调发展, 才能有效激活企业资源, 提高技术创新能力, 并提出了中国企业增加技术创新资源的途径, 即应注重管理创新, 从而提高技术创新能力。     

中国水产品统计数据修正规律研究——以水产品总量和海水产品产量为例

近年来,水产品统计数据存在水分问题引起了广泛关注。国家统计局已对1997—2006年间水产品部分指标数据进行了修正,但未对这些指标的虚报特征进行阐述。通过对修正前后水产品总量和海水产品产量2个指标的数据特征进行分析,发现这2个指标的虚报量存在3点规律:2个指标的虚报量变化规律均符合带截距线性模型;2个变量的估计虚报量可以分解为固定虚报量和可变虚报量两部分;从增长率、固定虚报量、可变虚报量变化率和平均虚报率角度来看,水产品总量虚报特征均强于海水产品虚报特征。