Testing equality of variances for several normal populations

In this study, we develop a test based on computational approach for the equality of variances of several normal populations. The proposed method is numerically compared with the existing methods. The numeric results demonstrate that the proposed method performs very well in terms of type I error rate and power of test. Furthermore we study the robustness of the tests by using simulation study when the underlying data are from t, exponential and uniform distributions. Finally we analyze a real dataset that motivated our study using the proposed test.     

德国项目教学法在高职教学中的实践与创新

项目教学法是德国＂双元制＂职业院校中盛行的教学模式,但多用于工科专业。自引入我国以来,对于工科类高职院校来说,效果非常明显,但对于财经类专业应用效果不尽人意。本文选取财经类专业岗位财务管理岗位实际工作情境之一——筹资,以项目教学法为基础,构建了包括教学情境的设计、学生学习步骤一览表的制定、学生学习步骤计划书的设计、学生自我测试及测试题库的设计、工作任务的设计、参考信息的提供、学习方法和策略的指导、项目成果的展示要求、教学评价方法的制定共9个部分组成的课堂教学体系。     

中国当下依法治国对孙中山“训政”思想的新发展——关于中国法治现代化阶段论的思考

当前中国特色社会主义法治与孙中山先生的“训政”相比，两者相似之处在于都坚持一党执政，并将此视为法治现代化进程中不可或缺的一个阶段性特征；不同之处在于两者的内容和性质发生了根本变化。内容的变化主要体现在社会基础发生巨大变化和民主成分获得较大增长；性质的变化主要体现在它不再是资本主义而是中国特色社会主义性质。以一党长期执政、不搞西方多党竞争为特点的中国特色社会主义法治长期存在的原因是：中国属于后发的政府主导的赶超型现代化国家，没有形成橄榄形社会结构，需要通过建立能够集中力量办大事的政治体制，实现中国的“富”与“强”。     

HRD research and practice after ‘The Great COVID-19 Pause’: the time is now for bold,critical, research

ABSTRACT

The COVID-19 pandemic has disrupted life as we knew it and created an unprecedented opportunity to pause and assess ‘normal’ life and work. We have an opportunity to create a new ‘normal.’ What possibility does the chance to show up differently in our lives and work hold? The pandemic has caused significant shifts in values that will affect individuals, organizations, communities, and nations. This article challenges HRD scholars and practitioners to imagine how HRD might create a new normal through bold, critical research inquiry that interrogates exclusion, pursues organization and social justice, and creates humanly sustainable organizations and communities.     

Testing for Serial Independence: Beyond the Portmanteau Approach

Portmanteau tests are typically used to test serial independence even if, by construction, they are generally powerful only in presence of pairwise dependence between lagged variables. In this article, we present a simple statistic defining a new serial independence test, which is able to detect more general forms of dependence. In particular, differently from the Portmanteau tests, the resulting test is powerful also under a dependent process characterized by pairwise independence. A diagram, based on p-values from the proposed test, is introduced to investigate serial dependence. Finally, the effectiveness of the proposal is evaluated in a simulation study and with an application on financial data. Both show that the new test, used in synergy with the existing ones, helps in the identification of the true data-generating process. Supplementary materials for this article are available online.     

Similar coefficient for cluster of probability density functions

In this article, we propose a new criterion to evaluate the similarity of probability density functions (pdfs). We call this the criterion on similar coefficient of cluster (SCC) and use it as a tool to deal with overlap coefficients of pdfs in normal standard on [0;1]. With the support of the self-update algorithm for determining the suitable number of clusters, SCC then becomes a criterion to establish the corresponding cluster for pdfs. Moreover, some results on determination of SCC in case of two and more than two pdfs as well as relations of different SCCs and other measures are presented. The numerical examples in both synthetic data and real data are given not only to illustrate the suitability of proposed theories and algorithms but also to demonstrate the applicability and innovation of the proposed algorithm.     

The wisdom and madness of crowds: How information networks and board cognition help or hinder firm performance across the business cycle

We know little of why a minority of firms pursue counter-cyclical strategies and consequently outperform competitors during recessions. Based on the theory of institutional isomorphism, we hypothesize that these firms avoid the mimetic and normative pressures that promote strategic convergence during uncertainty. We demonstrate these effects at the board-level in a sample of 1,615 U.S. firms. Mimetic processes are evident, with firms' connectedness in board interlock networks attenuating profitability and decreasing firm value during recessions—a reversal of the positive effects during expansions. Normative pressures arise from homogeneity in directors’ educational and professional experience, with greater consequences for long-term performance. Overall, recessionary performance is improved when firms occupy relatively isolated positions in informational networks and appoint directors from a range of backgrounds.     

The dual-continuum approach: An extension of the contingency theory of strategic conflict management

This article examines the limitations of using a single advocacy-accommodation continuum when depicting organizational stance and movement in conflict situations (Cancel et al., 1997). The authors argue that advocacy and accommodation can vary independently in response to a variety of contingent factors. To comprehensively capture the locations and motions that are possible in organization-public conflicts, a two-continuum approach is proposed. Separate assessment of the effects of contingency variables on advocacy and accommodation can be used to accurately locate organizational stance along advocacy and accommodation continua. Strategic alternatives that cannot be depicted using a single continuum (such as favorable alignment of organization advocacy/public accommodation or unilateral change on the part of one party) can be captured if separate continua are employed. By depicting initial stances and desired directions of movement for both the organization and public, the dual-continuum approach can also provide practical guidance to public relations professionals in selecting strategies for achieving preferred outcomes and evaluating their effectiveness.     

Gendered Leadership: The Effects of Female Development Agency Leaders on Foreign Aid Spending

This article examines the effects of gender on the leadership of bilateral development aid agencies, particularly their official development assistance (ODA) allocations toward gender‐related programming. Drawing on earlier research on gendered leadership, the article tests the hypothesis that female director generals (DGs) and ministers responsible for aid agencies will allocate more ODA than their male counterparts toward gender programming. This existing literature on gendered leadership is divided: some scholars argue that women and men have distinct leadership styles on account of their gender, while others argue that the only distinguishing factor is the institutional context in which they lead. Drawing on data collected on aid flows and agency leadership within the major Western aid donors of the Organisation for Economic Co‐operation and Development (OECD) Development Assistance Committee (DAC) over the period from 1995 through 2009, we use pooled time series analysis to examine the effects of gendered leadership on aid allocation. Our analysis reveals a tendency for female DGs and ministers to focus ODA on gender‐mainstreaming programs, while male DGs focus ODA on gender‐focused programs. We argue that these divergent priorities reflect the women's desire to reform gendered power structures within their respective aid agencies, and the men's desire to maintain existing gender power structures from which they benefit.     

论《埤雅》声训推源

《埤雅》以声符释义贯穿全书，偶有穿凿附会之处。书中广泛运用声训之法，力求阐释事物命名之意，对声训推源进行了有益的探索，具有一定的科学性与进步性。