Heteroscedastic Global Tests that the Regression Parameters for Two or More Independent Groups are Identical

Simulation results are reported on methods that allow both within group and between group heteroscedasticity when testing the hypothesis that independent groups have identical regression parameters. The methods are based on a combination of extant techniques, but their finite-sample properties have not been studied. Included are results on the impact of removing all leverage points or just bad leverage points. The method used to identify leverage points can be important and can improve control over the Type I error probability. Results are illustrated using data from the Well Elderly II study.     

The residual effect of a growth-decay mechanism and the distributions of covariance structures

The product of two independent or dependent scalar normal variables, sums of products, sample covariances, and general bilinear forms are considered. Their distributions are shown to belong to a class called generalized Laplacian. A growth-decay mechanism is also shown to produce such a generalized Laplacian. Sets of necessary and sufficient conditions are derived for bilinear forms to belong to this class. As a generalization, the distributions of rectangular matrices associated with multivariate normal random vectors are also discussed.     

Examples of the use of an equivalence theorem in constructing optimum experimental designs for random-effects nonlinear regression models

The problem considered is that of finding an optimum measurement schedule to estimate population parameters in a nonlinear model when the patient effects are random. The paper presents examples of the use of sensitivity functions, derived from the General Equivalence Theorem for D-optimality, in the construction of optimum population designs for such schedules. With independent observations, the theorem applies to the potential inclusion of a single observation. However, in population designs the observations are correlated and the theorem applies to the inclusion of an additional measurement schedule. In one example, three groups of patients of differing size are subject to distinct schedules. Numerical, as opposed to analytical, calculation of the sensitivity function is advocated. The required covariances of the observations are found by simulation.     

On a Dualization of Graphical Gaussian Models: A Correction Note

Abstract.  We correct two proofs concerning Markov properties for graphs representing marginal independence relations.     

治安管理处罚方式的新发展

处罚方式是关于具体的处罚手段与类型的法律规定,在治安管理处罚中具有非常重要的作用。随着社会主体多元化,社会关系复杂化,治安管理处罚方式必然要多样化。国外的社区矫正制度尤其值得借鉴。     

刑罚适用根据的反思--析报应论与预防论

对传统的报应论和预防论做了一定深度的理性思辩和批判,试图追求正义与效益两大法律价值在刑罚适用中的最大体现.在正义与效益两者相矛盾的时候,当优先考虑正义这一法律题中应有之义.     

析我国刑法第十三条之规定

犯罪概念 ,大致上可以分为形式概念、实质概念及混合概念。我国刑法第十三条规定的是犯罪的混合概念 ,这一混合概念存在着逻辑上的缺陷 ,欠缺明确性和可操作性。文章就如何更为科学地定义犯罪 ,完善我国刑法第十三条作了初步探讨     

Multiple imputation of missing data with ante-dependence covariance structure

A controlled clinical trial was conducted to investigate the efficacy effect of a chemical compound in the treatment of Premenstrual Dysphoric Disorder (PMDD). The data from the trial showed a non-monotone pattern of missing data and an ante-dependence covariance structure. A new analytical method for imputing the missing data with the ante-dependence covariance is proposed. The PMDD data are analysed by the non-imputation method and two imputation methods: the proposed method and the MCMC method.     

造假、治假的非合作博奕分析

简要介绍了我国假冒伪劣产品的现状及其带来的危害。应用非合作博奕理论，通过建立博奕模型，分析了假冒伪劣产品产生的根源和治理对策，并给出了对执法打假部门相应的奖励系数和对政府领导相应的罚款系数。     

持有型犯罪立法理念偏差及价值冲突检讨

对于持有型犯罪的基本理论问题的争议一直存在,但是,目前刑法学界局限于研究如何界定“持有”的行为属性,以及持有型犯罪的定义、范围等形式层面,而不重视从立法意图、规范角度等实质层面评价持有型犯罪。为了弥补这一缺陷,检讨了持有型犯罪的立法基准是否妥当、罪刑配置是否均衡、规范设计是否存在缺陷、立法价值取向等问题,指出持有型犯罪目前存在的理念偏差及价值冲突问题,并认为持有型犯罪立法不应扩张。