信息技术项目产权结构及其管理模式的研究

基于Hart 产权理论, 应用两阶段博弈模型分析信息技术外包过程, 研究信息技术资产属 性、投资效用、人力资本属性对信息技术项目产权结构的影响. 公司根据资源重要性选择信息 技术外包的组织形式和产权结构, 控制被忽略的资产及其属性的负面作用, 特别是在外包过程 中应当充分考虑外包商人力资源管理和人力资源的稳定性. 证明了任何一方都应将投资用于 自己擅长的专业上, 任何信息技术项目产权结构都导致专用性投资不足, 产权结构选择是各种 产权结构的平衡, 关键问题是如何改进双边治理的低投资边际效益.     

the Block–Block Bootstrap: Improved Asymptotic Refinements

The asymptotic refinements attributable to the block bootstrap for time series are not as large as those of the nonparametric iid bootstrap or the parametric bootstrap. One reason is that the independence between the blocks in the block bootstrap sample does not mimic the dependence structure of the original sample. This is the join‐point problem. In this paper, we propose a method of solving this problem. The idea is not to alter the block bootstrap. Instead, we alter the original sample statistics to which the block bootstrap is applied. We introduce block statistics that possess join‐point features that are similar to those of the block bootstrap versions of these statistics. We refer to the application of the block bootstrap to block statistics as the block–block bootstrap. The asymptotic refinements of the block–block bootstrap are shown to be greater than those obtained with the block bootstrap and close to those obtained with the nonparametric iid bootstrap and parametric bootstrap.     

Two-way ANOVA when the distribution of the error terms is skew t

In this article, we assume that the distribution of the error terms is skew t in two-way analysis of variance (ANOVA). Skew t distribution is very flexible for modeling the symmetric and the skew datasets, since it reduces to the well-known normal, skew normal, and Student's t distributions. We obtain the estimators of the model parameters by using the maximum likelihood (ML) and the modified maximum likelihood (MML) methodologies. We also propose new test statistics based on these estimators for testing the equality of the treatment and the block means and also the interaction effect. The efficiencies of the ML and the MML estimators and the power values of the test statistics based on them are compared with the corresponding normal theory results via Monte Carlo simulation study. Simulation results show that the proposed methodologies are more preferable. We also show that the test statistics based on the ML estimators are more powerful than the test statistics based on the MML estimators as expected. However, power values of the test statistics based on the MML estimators are very close to the corresponding test statistics based on the ML estimators. At the end of the study, a real life example is given to show the implementation of the proposed methodologies.     

退休年龄与养老金支付

退休年龄由各国各地人口的平均寿命以及劳动力供求状况所决定 ,它对养老金的支付有重要影响作用。在人口老龄化日益加剧、劳动力供应日益困难的当今社会 ,不少国家和地区都做出了推迟退休年龄以维持养老基金平衡的政策选择。中国城镇职工退休年龄是几十年前规定的 ,在人口平均寿命不断增长、养老保险制度日益成熟的今天 ,也存在着推迟退休年龄的社会需求和可能条件。文章通过对养老保险制度赡养率、被动率的分析 ,提出了按男女有别、分步到位的原则推迟职工退休年龄的政策建议 ,文章还就一些地区大批办理职工提前退休的做法对养老金支付造成的压力进行了分析     

Determinanten der Sportaktivität und der Sportart im Lebenslauf

This paper investigates the impact of social class, occupational and family life-course, relocation, age, generation and gender on exercise. Longitudinal, life course-oriented analysis enables identification of the (often diverse) conditions for (re-)uptake and discontinuation of exercise. The paper takes a detailed look at different types of exercise, enabling exploration of the various motivating influences and barriers involved. The database is a retrospective representative survey of the 50 to 70 year old population of Baden-Württemberg, Germany. The results show that higher educational qualifications are associated with higher levels of exercise, whereas manual labor and – among women – childcare are associated with lower levels of exercise. With respect to the impact of education, cultural rather than economic capital seems to be the determining influence. Other factors – (un-)employment, partnership, relocation, age and cohort – tend to have more complex effects on exercise. Though being a member of the workforce reduces the likelihood of starting to exercise, it also reduces the likelihood of dropping out. Though partnership encourages the dissemination of exercise, initiation of a relationship is also associated with a higher incidence of discontinuation. Relocation prompts both initiation and discontinuation of exercise. Surprisingly, up to the over-50 age group, increasing age is associated with an increased prevalence of physical activity, especially among women. The results of analysis of social differences in terms of types of physical activity can be used in health programs to provide scientifically founded recommendations for the promotion of specific types of physical activity for lower educational groups, seniors, and other social groups whose lifestyle tends to be inactive.     

The power(lessness) of Czechoslovak Jews during the Second World War

The article evaluates the perceptions of Jewish power among the Czechoslovak exiles in Britain during the Second World War. The analysis documents the apparent persistence of prejudices against the Jewish minority among the Czechoslovak non-Jewish authorities that eventually formed the government-in-exile (1940–5), under the presidency of Edvard Bene? (1884–1948). The Czechoslovak exiles believed that the Jewish minority, in particular the Jewish nationalists (Zionists), had vehement supporters within Jewish circles in Western countries. Furthermore, they believed that the Jewish press played a significant role in the formation of public opinion in Britain and especially in the United States. In the early 1940s, the government-in-exile embarked on a policy of national homogenisation of post-war Czechoslovakia and was anxious to give concessions to the political representatives of the ethnic minority groups in exile, in particular the Germans, Hungarians and Jews. Yet the concerns about Jewish influence in liberal democracies granted several political concessions to the Jewish minority, in particular the appointment of a Zionist representative, Arno?t Frischer (1887–1954), to the exile parliament. This notwithstanding, by analysing the internal situation among the Czechoslovak Jewish groups in London, the article documents the internal weakness and disputes among the Jewish groups which gradually revealed the utter powerlessness of the Jewish exiles during their negotiations with the Czechoslovak authorities. The Jewish groups (the assimilationists, Orthodox and secular nationalists) were divided by mutual as well as internal disputes which were not concealed from outside observers and were utilised by the exile government. What emerges from the analysis is an impression of quarrelling groups that could not agree on any of the fundamental issues and whose only power was the ability to court the support of Western Jewish groups, which were perceived by the non-Jewish exiles as influential actors in US and British society.     

Exact distribution of a modified Behrens–Fisher statistic

The exact distribution of a modified Behrens–Fisher statistic is derived. The distribution function is mostly elementary and is simpler than the exact distribution derived by Nel et al. Its practical use (including computationalefficiency and computational convenience) is discussed.     

Mesurer les coǔts de licenciement: de l'intérět des méthodes directes

Les coǔts de licenciement, ainsi que l'appareil législatif et réglementaire régissant les relations professionnelles, sont souvent blǎmés pour les mauvaises performances du marché du travail. Toutefois, les études théoriques et économétriques sur l'impact économique de ces coǔts ne sont pas concluantes. Par le passé, on s'est surtout intéressé aux hypothèses fonctionnelles et à l'incidence des divers paramètres, mais on a très peu analysé la qualité et la précision des méthodes de mesure de ces coǔts, dont dépendent pourtant la plupart des résultats en cette matière. L'auteur examine les méthodes de mesure directes et indirectes couramment utilisées en ce domaine, et soutient qu'il est essentiel d'employer les méthodes quantitatives directes, rarement utilisées par les chercheurs, pour compléter les méthodes de mesure indirectes auxquelles on a généralement recours. Ce point est illustré par les résultats d'un sondage expérimental récemment mené en Australie.     

组织职业生涯管理及效果的实证研究

通过开放式问卷调查和访谈, 结合国外的职业生涯管理的做法, 编制了适合我国国情的 组织职业生涯管理问卷, 将问卷在广州、武汉、十堰、襄樊等地的12 家国有企业、民营企业、股 份制企业的管理者、技术人员中进行了调查, 获得了410 份有效问卷. 分析结果表明: 我国组织职业生涯管理的结构主要体现在4 个维度: 即晋升公平、注重培训、组织自我认识的活动、职业发展信息的沟通; 而且这4 个维度对组织承诺、工作卷入度、职业满意度、工作绩效等产生积极的影响.     

2*500t跨墩提梁机安全拆除技术

2*500t跨墩提梁机自重、跨度、净高都较大,拆除存在较大安全风险.本文系统总结了京沪客专云龙梁厂2*500t跨墩提梁机的拆除技术,可为类似工程提供参考.