Monotonic change point estimation of generalized linear model-based regression profiles

In this article, a maximum likelihood estimator is derived in the generalized linear model-based regression profiles under monotonic change in Phase II. The performance of the proposed estimator is comprehensively investigated through some special cases, and compared with estimators under step change and drift. The results show that the proposed estimator has better performance in small and medium shifts under different increasing changes. Finally, the applicability of the proposed estimator is illustrated using a real case.     

Likelihood procedure for testing changes in skew normal model with applications to stock returns

The skew normal distribution family is an attractive distribution family due to its mathematical tractability and inclusion of the normal distribution as the special case. It has wide applications in many applied fields such as finance, economics, and medical research. Such a distribution family has been studied extensively since it was introduced by Azzalini in 1985 Azzalini, A. (1985). A class of distributions which includes the normal ones. Scandinavian Journal of Statistics 12:171–178. [Google Scholar] for the first time. Yet, few work has been done on the study of change point problem related to this distribution family. In this article, we propose the likelihood ratio test (LRT) to detect changes in the parameters of the skew normal distribution associated with some asymptotic results of the test statistic. Simulations have been conducted under different scenarios to investigate the performance of the proposed method. Comparisons to some other existing method indicate the comparable power of the method in detecting changes in parameters of the skew normal distribution model. Applications on two real data: Brazilian and Tanzanian stock returns illustrate the detection procedure.     

Competing Values Framework: A useful tool to define the predominant culture in a maternity setting in Australia

Objective

To identify the predominant culture of an organisation which could then assess readiness for change.

Predictors of treatment outcome in a child and adolescent psychiatry clinic: A naturalistic exploration

We present data on predictors of treatment outcome for 3200 consecutive referrals to a child and adolescent psychiatry clinic. Using Reliable Change Index (RCI) methodology, we divided children into those who, between intake and discharge, improved, stayed the same, or got worse according to clinician-rated impairment. Most predictors of improvement were related to parent variables (marital status, maternal anxiety, and ethnicity), while those associated with deterioration were tied to child status (extent of psychiatric comorbidity, history of placement in a self-contained classroom, and a prior trial of psychotropic medications). The implications of these findings for data-driven program development, clinic management, treatment planning, and systems of care are discussed.     

气候变化政治对海湾国家的影响

海湾地区气候炎热,淡水资源缺乏。长期以来,海湾国家主要依靠能源出口获取大量资金,借此修建海水淡化工厂等各种设施以适应和改善气候环境的影响。近年来,国际社会在应对全球变暖问题的协调合作中,已形成一种处理全球气候变化的政治。气候变化政治要求各国减少能源消耗和降低二氧化碳排放量以缓解全球变暖趋势,从而对海湾国家以能源出口收益来维护生存环境和社会稳定的基本经济模式构成冲击。面对气候变化政治带来的冲击,海湾国家目前的权宜选择只能是继续扩大能源出口,并尽量拖延实施气候变化协议来进行应对。然而,这种做法虽可以暂时保持海湾国家改善环境的努力和维护其经济政治结构稳定,但却难以消除全球气候变化政治今后长期推动能源结构调整和节能减排所带来的压力。     

ICT投资、互联网普及和全要素生产率

本文使用DEA-Malmquist指数方法对2002-2012年我国分行业全要素生产率、技术效率与技术进步进行测算,并基于我国地区投入产出表构建了ICT资本投入强度。在此基础上,本文就ICT投资对生产率的影响进行了实证检验。研究发现,ICT投资对全要素生产率提升具有积极作用,并且主要通过ICT投资促进技术效率提升实现。面板门限回归模型的结果显示,只有达到一定互联网普及率时,ICT投资促进技术效率提升的作用才显现,并在高互联网普及率时进一步增强;但在高互联网普及率下,ICT 投资对技术进步存在抑制作用,在全要素生产率层面表现为ICT 投资的促进作用消失。因此,现实的ICT 投资应重视通过信息化管理提升行业资源的有效利用能力,以最大化技术效率对全要素生产率的贡献;应充分考虑不同行业和地区的互联网普及程度,以深度激发“连接经济”对于释放ICT效能的互补性作用;还应注意配套相应产业政策,以减轻互联网发展对技术进步的阻碍作用。     

The effectiveness and specificity of change management in a public organization: Transformational leadership and a bureaucratic organizational structure

There is an extensive private sector literature on organizational change management. However, recent studies have suggested that the specific context of public organizations may have consequences for the management organizational change. This study examines to what extent different change approaches and transformational leadership of direct supervisors contribute to the effective implementation of organizational change in public organizations, and to what extent the bureaucratic structure of public organizations makes the implementation of organizational change s3pecific. The implementation of an organizational change in a Dutch public organization is studied using quantitative methods and techniques. The results indicate that bureaucratic organizations may effectively implement organizational change with both planned and emergent change approaches. The contribution of transformational leadership depends on the type of change approach and organizational structure. Transformational leadership behavior of direct supervisors contributes little to planned processes of change, but is crucial in emergent processes of change in a non-bureaucratic context. Although the literature on change management mostly emphasizes the leadership of senior managers, the leadership role of direct supervisors should not be overlooked during organizational change in public organizations.     

Establishing dominance between strategies with interval judgments of state probabilities

In decision-making under uncertainty, a decision-maker is required to specify, possibly with the help of decision analysts, point estimates of the probabilities of uncertain events. In this setting, it is often difficult to obtain very precise measurements of the decision-maker׳s probabilities on the states of nature particularly when little information is available to evaluate probabilities, available information is not specific enough, or we have to model the conflict case where several information sources are available.In this paper, imprecise probabilities are considered for representing the decision-maker׳s perception or past experience about the states of nature, to be specific, interval probabilities, which can be further categorized as (a) intervals of individual probabilities, (b) intervals of probability differences, and (c) intervals of ratio probabilities. We present a heuristic approach to modeling a wider range of types of probabilities as well as three types of interval probabilities. In particular, the intervals of ratio probabilities, which are widely used in the uncertain AHP context, are analyzed to find extreme points by the use of change of variables, not to mention the first two types of interval probabilities. Finally, we examine how these extreme points can be used to determine an ordering or partial ordering of the expected values of strategies.     

战略变革中的企业文化研究

由于企业所处的外部环境的不确定性、不连续性和难以预测性的增加 ,西方管理学界对企业战略变革的关注与日俱增。本文主要从企业战略与企业文化的关系入手 ,通过分析企业当前面临的战略变革环境 ,提出在企业战略变革中 ,企业文化应扮演的角色 ,以及如何使战略变革在组织文化中产生根深蒂固的影响。     

基于股利变更公告的股利信号效应研究

本文根据上市公司发布的股利变更公告,提供了一个比之前文献利用年报研究股利市场反应更为干净的方法,研究上市公司股利发放的市场反应。本文进一步研究了各种股利发放变动与公司现金流、盈余之间的关系,从而对上市公司股利政策的信号传递效应进行检验。结果发现,我国上市公司的现金股利发放并没有信号传递效应;股票股利发放只是传递了关于公司当期净利润的信息,并没有传递关于公司未来盈余的信息。具体来说,市场对现金股利变更的反应不及对股票股利变更的反应敏感;同时发现,现金股利的变更与公司现金流、盈余之间并没有显著关系,而股票股利的变更则参考了当期净利润的表现。