A test for the mean vector in large dimension and small samples

In this paper, we consider the problem of testing the mean vector in the multivariate setting where the dimension p is greater than the sample size n, namely a large p and small n problem. We propose a new scalar transform invariant test and show the asymptotic null distribution and power of the proposed test under weaker conditions than Srivastava (2009). We also present numerical studies including simulations and a real example of microarray data with comparison to existing tests developed for a large p and small n problem.     

Specification Test for Spatial Autoregressive Models

This article considers a simple test for the correct specification of linear spatial autoregressive models, assuming that the choice of the weight matrix W_n is true. We derive the limiting distributions of the test under the null hypothesis of correct specification and a sequence of local alternatives. We show that the test is free of nuisance parameters asymptotically under the null and prove the consistency of our test. To improve the finite sample performance of our test, we also propose a residual-based wild bootstrap and justify its asymptotic validity. We conduct a small set of Monte Carlo simulations to investigate the finite sample properties of our tests. Finally, we apply the test to two empirical datasets: the vote cast and the economic growth rate. We reject the linear spatial autoregressive model in the vote cast example but fail to reject it in the economic growth rate example. Supplementary materials for this article are available online.     

Selecting Regressors for Prediction Using PRESS and White t Statistics

It is shown that selecting regressors based on the prediction error sum of squares is asymptotically related to hypothesis testing with White's (1980) heteroscedasticity-consistent covariance matrix. A simulation experiment suggests that this asymptotic relation may be useful. Illustrative examples are also given.     

Comments on “bootstrapping time series models”

Many applied workers are strongly oriented to residual analysis for assessing model adequacy. Formal test statistics of adequacy however are frequently derived from likelihood theory, particularly through Lagrange Multipliers. In contraGt, the present paper derives the formal statistics by concentrating Upon the distribution of residuals. It is shown that most existing tests can be derived in this way from a few elementary principles of specification analysis. One advantage of this alternative methodology is that it highlights some difficulties in existing approaches and simultaneously indicates a resolution of them; a good example being testing for heteroscedasticity in simultaneous equations. Other issues such as independence and robustness of diagnostic tests are also easily explored within the proposed framework.     

Karlin's corollary: a topological approach to pitman's measure

In this article, many of the known univariate results about Pitman's Measure of Closeness (PMC) are synthesized through a topological approach. The proofs of many known results are simplified and clarified. The approach extends some previous results established under other restrictions. Connections between PMC and Bayesian estimation are discussed but the inherent interpretations differ. A discourse on this connection can be found in the article of Ghosh and Sen (1991). A transitiveness property for ordered estimators is established and a counter example is given for unordered ones. These results help distinguish between the Bayesian and classical interpretations of Pitman's measure.     

The World of Research Has Gone Berserk: Modeling the Consequences of Requiring “Greater Statistical Stringency” for Scientific Publication

ABSTRACT

In response to growing concern about the reliability and reproducibility of published science, researchers have proposed adopting measures of “greater statistical stringency,” including suggestions to require larger sample sizes and to lower the highly criticized “p?<?0.05” significance threshold. While pros and cons are vigorously debated, there has been little to no modeling of how adopting these measures might affect what type of science is published. In this article, we develop a novel optimality model that, given current incentives to publish, predicts a researcher’s most rational use of resources in terms of the number of studies to undertake, the statistical power to devote to each study, and the desirable prestudy odds to pursue. We then develop a methodology that allows one to estimate the reliability of published research by considering a distribution of preferred research strategies. Using this approach, we investigate the merits of adopting measures of “greater statistical stringency” with the goal of informing the ongoing debate.     

Designing effective team-based performance measurement systems: an integrated approach

Measuring the performance of teams and, in particular, designing effective team-based performance measurement systems (TPMS) can be a difficult task. The purpose of this paper is to take the reader through the development and testing of a construct that provides an integrated approach to facilitate the design of TPMS. This construct was developed and tested based on a rigorous set of criteria adopted from constructive research theory as well as from existing performance measurement literature. The construct was tested in a series of workshops described in this paper. The data gathered during these workshops demonstrates the novelty and validity of the construct. The paper should be of interest to managers, team leaders and indeed anyone who is interested in monitoring and managing team performance. The paper will also be of interest to academics working in the fields of performance measurement and team management.     

论未来教师“儿童心理健康诊测能力”的培养

未来教师是国家的未来,肩负着培养祖国接班人的重任。为了更充分发扬师范生教书育人的功能,不仅自己需要有健康的心理,还能够对小学生、儿童进行心理健康的诊断、辅导、咨询,以及具有心理素质和健康水平的测量等能力。通过问卷了解师范生的心理健康状况和心理健康诊测能力现状,提出＂儿童心理健康诊测能力＂培养的建议。     

Testing,One, Two,Three, Testing: An Attorney Perspective

SUMMARY

This article addresses the attorney perspective on the use of psychometric testing in the context of family law child custody evaluations. Although attorneys, judicial officers and child custody evaluators “use” psychometric testing in family law matters, the ways in which each discipline uses the information gleaned from the results of these tests as administered to child custody litigants can differ substantially. This article distinguishes the attorney perspective from the mental health perspective in the use of the results of such tests.     

后发复杂产品系统制造企业的技术演化:一个探索性案例研究

本文采用探索性嵌入式单案例研究,以北车集团大连机车车辆有限公司八类复杂产品系统的技术发展历程为分析单元,研究发现:后发复杂产品系统制造企业的技术系统包括架构、元件和测试技术,测试技术是联接架构与元件技术的纽带;从技术获取到自主研发,三类技术分别经历了引进、消化吸收、系列化,引进、国产化与周边元件改进、核心元件研发与元件改进,以及匹配性测试、周边元件性能与匹配性测试、元件性能与匹配性测试三个发展阶段。最后通过与"简单"产品制造企业技术演化特征的比较,提出后发复杂产品系统制造企业的技术演化具有架构与元件技术并行消化吸收、测试技术促进架构与元件技术发展、核心元件技术研发模式多样的特征。