企业集团内部资本市场有效性及影响因素研究

内部资本市场的研究大多关注存在性和效率问题,对内部资本市场有效性的影响因素关注较少。在投资-现金流的分析框架下,以2009-2012年沪深两市的上市公司及其附属集团为研究对象,构建企业投资加速模型,从组织结构的角度研究影响内部资本市场有效性的因素。研究结论显示：一方面,我国企业集团的内部资本市场是有效的,国有企业集团内部资本市场的有效性强于非国有企业集团;另一方面,集团所有权对内部资本市场有效性的影响不显著,但财务公司的设立对提升内部资本市场的有效性起了积极的促进作用,非国有企业集团财务公司的职能实现比国有企业集团更加有效。     

政府信息沟通存在的障碍及其创新路径——基于群体事件的语境分析

近年来,随着群体性事件数量的不断攀升,破坏性也与日剧增,已然成为影响社会稳定发展的重要因素,亟需政府采取有效措施来治理从而改善和维护政府的公共形象。然而,由于信息沟通机制的不健全,政府在处理群体性事件过程中存在一定的沟通梗塞,使得群体性事件的治理成效深受局限,而通过再造政府内部体系以及拓展外部沟通渠道的“双维”路径,在一定程度上能够提升政府处置群体性事件理应具备的沟通能力。     

Family participation in child protection practice: an observational study of family group meetings

Over the past two decades, child protection authorities internationally have begun to implement models of family participation in child protection decision‐making. Debate exists about the extent to which these models promote family involvement in decision‐making. While a significant body of research on family and professional experience and perceptions of models of family participation in decision‐making has emerged, there has been little observational research of these approaches. In this paper, we report on observational data from 11 family group meetings (FGMs) in a child protection context in Queensland, Australia. Under Queensland child protection law, these meetings are referred to as an inclusive process for child protection decision‐making and planning. We draw on observational data to analyse how family inclusion in child protection decision‐making is facilitated, or limited, by the FGM process. We consider tensions in the realization of a participatory ethos in child protection services systems and discuss what practitioners can practically do to enhance family participation in child protection decision‐making.     

Parents Beyond Borders: A Social Group Work Curriculum for Supporting Immigrant Parents and Building Solidarity

Parents Beyond Borders, a curriculum first implemented in 2008 as part of The Center for Family Life's ParentShip Program, encourages group members to create a shared narrative about their traumatic immigration experiences. The result is twofold. First, immigrant parents gain a more assertive and poignant voice to communicate with family and others in their lives when sharing their family's acculturation experience. Second, because social group work promotes recognition of collective trauma due to the community's experience of marginalization, it improves members' group self-concept and empowers them to take action and advocate for themselves.     

法国大革命中的传播活动

法国大革命呈现了不同于英美资产阶级革命的特点.在缺乏现代化传播媒介的法国,谣言、团体和报刊等传播方式在动员和组织群众参与革命、推动革命不断向前发展方面起了重大的作用,形成了法国革命独特的政治风格和文化风格.     

Three-stage designs for monitoring clinical trials

Optimal three-stage designs with equal sample sizes at each stage are presented and compared to fixed sample designs, fully sequential designs, designs restricted to use the fixed sample critical value at the final stage, and to modifications of other group sequential designs previously proposed in the literature. Typically, the greatest savings realized with interim analyses are obtained by the first interim look. More than 50% of the savings possible with a fully sequential design can be realized with a simple two-stage design. Three-stage designs can realize as much as 75% of the possible savings. Without much loss in efficiency, the designs can be modified so that the critical value at the final stage equals the usual fixed sample value while maintaining the overall level of significance, alleviating some potential confusion should a final stage be necessary. Some common group sequential designs, modified to allow early acceptance of the null hypothesis, are shown to be nearly optimal in some settings while performing poorly in others. An example is given to illustrate the use of several three-stage plans in the design of clinical trials.     

Group sequential x2 statistic for testing the difference of two mean vectors in clinical trials

In this study we discuss the group sequential procedures for comparing two treatments based on multivariate observations in clinical trials. Also we suppose that a response vector on each of two treatments has a multivariate normal distribution with unknown covariance matrix. Then we propose a group sequential x² statistic in order to carry out repeated significance test for hypothesis of no difference between two population mean vectors. In order to realize the group sequential test where average sample number is reduced, we propose another modified group sequential x² statistic by extension of Jennison and Turnbull ( 1991 ). After construction of repeated confidence boundaries for making the repeated significance test, we compare two group sequential procedures based on two statistics regarding the average sample number and the power of the test in the simulations.     

两个有限群子群指数之集相等的几个充分条件

讨论了子群指数之集的性质以及给出了两个有限群子群指数之集相等的充分条件.     

新时期社会思潮对研究生思想政治教育的影响与对策

研究生群体是受社会思潮影响较大的社会群体,结合研究生群体思想政治教育现状及特点,分析了新时期多样化社会思潮对研究生群体产生的积极和消极影响,并对加强研究生群体思想政治教育提出了超前研究、分类引导、主动整合、加强建设的应对策略.     

Peer Group Affiliation of Children: The Role of Perceived Popularity,Likeability, and Behavioral Similarity in Bullying

To understand children's peer group affiliation, this study examined to what extent children in naturally occurring groups resemble each other on bullying, likeability, and perceived popularity. Participants were fourth‐ to sixth‐grade pupils (N = 461). Peer groups were identified using the social cognitive map procedure. Resemblance on bullying, likeability, and perceived popularity was evaluated by means of variance components models. Resemblance in peer groups was strongest for perceived popularity, followed by bullying and likeability. Moreover, resemblance on bullying could for a large part be attributed to the high‐perceived popularity of the group, and to a lesser extent, to the low likeability of the group. It is concluded that children showing bullying seem to affiliate with each other most of all to attain or maintain their position in a perceived popular peer group. Results stress the importance of considering the functionality of bullying from a group perspective.