Model Diagnostics for Remote Access Regression Servers

To protect public-use microdata, one approach is not to allow users access to the microdata. Instead, users submit analyses to a remote computer that reports back basic output from the fitted model, such as coefficients and standard errors. To be most useful, this remote server also should provide some way for users to check the fit of their models, without disclosing actual data values. This paper discusses regression diagnostics for remote servers. The proposal is to release synthetic diagnostics—i.e. simulated values of residuals and dependent and independent variables–constructed to mimic the relationships among the real-data residuals and independent variables. Using simulations, it is shown that the proposed synthetic diagnostics can reveal model inadequacies without substantial increase in the risk of disclosures. This approach also can be used to develop remote server diagnostics for generalized linear models.     

从分笔交易数据透视中国债券市场流动性

采用分笔交易数据,用相对买卖价差分析我国债券市场流动性,可以得出如下结论:各期限国债流动性差异不大,短期和长期国债流动性相对较好;国债买卖价差最小,可转债累计深度最大;债券市场流动性和波动性特征之间存在紧密的内在联系。     

高等学校实施素质教育当议

高等学校是培养德、智、体全面发展的人才,对大学生不仅要注重知识的传输,同时也要加强个性、人格和心理品质等方面的教育,本文针对目前高等学校的教育现状,阐述了加强大学生素质教育的必要性和现实意义;提出了加强大学生素质教育的主要做法;指出了加强大学生素质教育应注意的问题,以期引起教育和教育管理工作的注意,全面提高高等教育的教育质量,为社会培养更多有用的合格人才。     

Issues in applying recent CPMP ‘Points to Consider’ and FDA guidance documents with biostatistical implications

The International Conference on Harmonisation guideline ‘Statistical Principles for Clinical Trials’ was adopted by the Committee for Proprietary Medicinal Products (CPMP) in March 1998, and consequently is operational in Europe. Since then more detailed guidance on selected topics has been issued by the CPMP in the form of ‘Points to Consider’ documents. The intent of these was to give guidance particularly to non‐statistical reviewers within regulatory authorities, although of course they also provide a good source of information for pharmaceutical industry statisticians. In addition, the Food and Drug Administration has recently issued a draft guideline on data monitoring committees. In November 2002 a one‐day discussion forum was held in London by Statisticians in the Pharmaceutical Industry (PSI). The aim of the meeting was to discuss how statisticians were responding to some of the issues covered in these new guidelines, and to document consensus views where they existed. The forum was attended by industry, academic and regulatory statisticians. This paper outlines the questions raised, resulting discussions and consensus views reached. It is clear from the guidelines and discussions at the workshop that the statistical analysis strategy must be planned during the design phase of a clinical trial and carefully documented. Once the study is complete the analysis strategy should be thoughtfully executed and the findings reported. Copyright © 2003 John Wiley & Sons, Ltd.     

大学生党员发展问题与解决对策

温州师范学院的学生党建工作实践表明,大学生党员发展问题既表现为学生的个人问题,即入党动机多样复杂、功利目的增强。又表现为党的工作过程问题与党的工作队伍问题,即入党尺度把握不准;深入群众不够;“严把入口关”困难;工作量大与人员少之间形成矛盾。问题的解决应加强理论研究、提高党建水平;通过对学生党员的继续教育、监督管理、实践锻练来提高素质,发挥先锋模范作用;要从理论教育与机制方面加强对入党积极分分子的培养,切实保证党员质量。     

主审法官负责制的实现条件及当前应解决的问题

主审法官负责制是人民法院为实现司法公正解决司法独立问题所进行的内部结构性改革,在推行时须注意五大实现条件和解决好当前存在的三大问题。在实现条件上,要求主审法官有较高的业务素质和良好的政治道德素质,为此,应搞好法官的选任工作,在此基础上,建立完善的法官任职保障、物质保障制度和落实主审法官职务上的权利和义务。而须解决的三大问题是,当前应对现有法官队伍进行选拔淘汰并合理分流,对已任或新任法官加强培养工作,增强其业务技能,对行政化的审判业务运作机制应予以消除,实现主审法官独立办案。     

浅析高校教师职称评审中存在的问题及其对策

专业技术职务评审是目前对高等学校教师的学术水平、工作能力、工作业绩的综合测试方式之一,也是对知识和教师的尊重以及对教师复杂劳动的肯定,它关系到学校每位教师的切身利益。目前,高等学校在职称评审中还存在着一些问题。本文对职称评审中存在的问题进行了分析,并提出了解决问题的对策和建议。     

经济预测中的Monte Carlo模拟及方差控制——以国际石油价格预测为例

从MDnte Carlo模拟的实现过程入手，首先通过对Monte Carlo方法原理的阐述来介绍该种方法。进一步结合具体的实例通过计算机进行模拟来解释Monte Carlo方法的具体实现过程。重点讨论在选择合理的数据生成过程的前提下，如何在Monte Carlo方法中减少模拟方差，从而提高估计精度，更好地应用这种方法来进行经济预测。     

Estimation of dependence between paired correlated failure times in the presence of covariate measurement error

Summary. In many biomedical studies, covariates are subject to measurement error. Although it is well known that the regression coefficients estimators can be substantially biased if the measurement error is not accommodated, there has been little study of the effect of covariate measurement error on the estimation of the dependence between bivariate failure times. We show that the dependence parameter estimator in the Clayton–Oakes model can be considerably biased if the measurement error in the covariate is not accommodated. In contrast with the typical bias towards the null for marginal regression coefficients, the dependence parameter can be biased in either direction. We introduce a bias reduction technique for the bivariate survival function in copula models while assuming an additive measurement error model and replicated measurement for the covariates, and we study the large and small sample properties of the dependence parameter estimator proposed.     

浅谈高校声像档案管理中存在的问题及对策

对目前高校声像档案管理中存在的一些问题进行了分析，并结合工作实践提出了强化声像档案意识、加强声像档案收集以及管好用好声像档案的对策，以提高高校声像档案管理水平，更好地为学校各项工作服务。