Quadratic estimators of covariance components in a multivariate mixed linear model

It is known that the Henderson Method III (Biometrics 9:226–252, 1953) is of special interest for the mixed linear models because the estimators of the variance components are unaffected by the parameters of the fixed factor (or factors). This article deals with generalizations and minor extensions of the results obtained for the univariate linear models. A MANOVA mixed model is presented in a convenient form and the covariance components estimators are given on finite dimensional linear spaces. The results use both the usual parametric representations and the coordinate-free approach of Kruskal (Ann Math Statist 39:70–75, 1968) and Eaton (Ann Math Statist 41:528–538, 1970). The normal equations are generalized and it is given a necessary and sufficient condition for the existence of quadratic unbiased estimators for covariance components in the considered model.     

简论潜在课程对提高大学生素质和创新能力的作用

素质教育是培养创新人才、构建和谐社会的重要教育实践环节,而潜在课程建设对素质教育具有不可替代的指导和促进作用。潜在课程指在学校自然环境、人文环境等因素影响下所构成的一种无形的、非正规的具有陶冶作用的集合体,具有潜在性、丰富性、持久性、经验性等特点,对大学生思想品德、实践能力等各方面的素质提高以及创新能力培养具有重要作用。高校潜在课程的开发和建设,为提高大学生综合素质,培养大学生创新能力提供了新的思路。     

试论股份回购对上市公司财务管理的影响

指出股份回购是抵御外来收购、优化资本结构、提升公司股价、分配股利以及经营者股权激励等的有效手段,有助于优化资本结构、完善公司治理,分析了股份回购对上市公司资本结构、股票价格、股利政策、公司风险、财务指标等问题所产生的影响.     

论《统一域名争端解决政策》的若干法律问题

《统一域名争端解决政策》因其时效性、便捷性成为一种国际间广泛接受的庭外域名争端解决机制,同时也为各国的相关立法提供了蓝本。该机制在实践中暴露出一些问题,如政策中的几个关键概念模糊不清,UDRP专家组裁决前后不一致等,为此应当对该政策加以改进。域名争端的根源在于目前的域名注册管理体系与商标的注册管理体系的冲突,要从根本上解决域名争端,必须协调国际域名注册管理体系与国际商标注册管理体系。     

Wer das Stabilisieren vergisst: Warum eine schöne Abschlusspräsentation noch kein gutes Ende bedeutet

Many organizational change projects fail — despite a well thought out concept, professional project management and a binding implementation timetable. The reason why the expected success doesn’t materialize often lies with the missing maintenance. Once the project is officially completed and the client and project manager withdraw, the manner in which the organization will take up these changes is seldom systematically dealt with. Difficulties often arise when no discrete stabilizing measures are planned. We have derived four central action areas which will be clarified by way of practical examples. It will also be shown what is important to pay attention to in the stabilization phase so that a lasting success of the organizational change project can be ensured.     

Consumption and Saving Behavior of Older and Younger Baby Boomers in Korea

The 1998 Korean Survey of Family Income and Expenditures was used to examine the overall consumption and saving behavior of Korean baby boomers and compared the differences in consumption and saving behavior between older and younger boomers. The t -test results indicated that the younger boomers allocated a significantly higher percentage of their expenditures on food away from home, household appliances, transportation and communication than did the older boomers, whereas the older boomers spent higher amounts and allocated larger budget shares on their children's education than did the younger boomers. The results of Ordinary Least-Squares (OLS) regression analysis showed that, holding other factors constant, older boomers not only spent significantly more in the total consumption expenditures and education expenditures, but older boomers also saved significantly less than did younger boomers.     

Privatization of refuse removal and labor costs

We examine the labor-cost savings associated with privatization by comparing earnings and employment trends of public and private sector refuse workers. Findings suggest that high union earnings for workers in the public sector are a source of labor-cost savings in the refuse industry. Evidence on job changers does not indicate that earnings for this group of workers are a compensating differential. Metropolitan area employment findings suggest that municipalities are less likely to use union refuse workers in the public sector when a relatively small percentage of area residents belong to a union. The authors thank Jacqueline Agesa, Keith Bender, Maria Crawford, and Richard Perlman for valuable suggestions. Research assistance from Eric Blackburn is greatly appreciated.     

皇家亚洲文会北中国支会述论

皇家亚洲文会北中国支会是近代外侨在上海建立的一个重要文化机构 ,95年里 ,它对中国的自然和社会进行了广泛调查与深入研究 ,以其独有的模式在中西文化交流过程中做出了突出贡献。     

Local influence analysis in the growth curve model with Rao's simple covariance structure

In this paper we discuss the likelihood-based local influence in a growth curve model with Rao's simple covariance structure. Under an abstract perturbation, the Hessian matrix is provided in which the eigenvector corresponding to the maximum absolute eigenvalue is used to assess the influence of observations. Specifically, we employ covariance-weighted perturbation to demonstrate the use of the proposed approach. A practical example is analysed using the proposed local influence approach.