The Social Impacts of Electronic Mail in Organizations: A case study of electronic power games using communication genres

This paper investigates the effects of the introduction of electronic mail on organizational structure and power. It provides empirical support to the view that technology, organizational context, and individual actors interact to shape the use of Information and Communication Technologies (ICTs) and their effect on organizations. Through an analysis of power games reflected in the progressive constitution of electronic mail genres, it illustrates in particular how the specific organizational configurations in which technology is deployed deeply influence its ultimate use. Far from transforming an organization, it appears that the introduction of electronic communication tools may in certain circumstances help reinforce an organization's preexisting structure.     

Calculating power for the comparison of dependent κ-coefficients

Summary. In the psychosocial and medical sciences, some studies are designed to assess the agreement between different raters and/or different instruments. Often the same sample will be used to compare the agreement between two or more assessment methods for simplicity and to take advantage of the positive correlation of the ratings. Although sample size calculations have become an important element in the design of research projects, such methods for agreement studies are scarce. We adapt the generalized estimating equations approach for modelling dependent κ -statistics to estimate the sample size that is required for dependent agreement studies. We calculate the power based on a Wald test for the equality of two dependent κ -statistics. The Wald test statistic has a non-central χ ²-distribution with non-centrality parameter that can be estimated with minimal assumptions. The method proposed is useful for agreement studies with two raters and two instruments, and is easily extendable to multiple raters and multiple instruments. Furthermore, the method proposed allows for rater bias. Power calculations for binary ratings under various scenarios are presented. Analyses of two biomedical studies are used for illustration.     

从国家起源看权力腐败与防治

腐败和公共权力密切相关 ,并和公共权力始终相伴。人的贪欲是人的一种非理性的欲求 ,一旦假借公共权力 ,为自己谋求私利 ,腐败便产生了。腐败并不可怕。防治腐败的关键是建立有效的公共权力制约监督机制。     

对我国民法典中应否设定第三类民事主体的思考

民法典中应否设立第三类民事主体,立法和理论研究中都存在不同的观点。本文主要观点:一是设立第三类民事主体是有意义的,它可以弥补一些特殊主体因法律没有明确规定其人格地位而形成的主体缺位漏洞,使法律关系难以调整的问题得到解决;二是应纠正现有民法主体理论中存在对权利能力认识的错误,消除“主体间权利能力不平等”的理论悖论;三是应通过立法解决因设立第三类民事主体而引起的矛盾。     

The Retirement Syndrome:: The Psychology of Letting Go

This article analyzes a problem that can be described as the retirement syndrome. In exploring the difficulties many leaders face in letting go at the end of a full career, it reviews a number of the barriers to exit: financial, social, and psychological. It looks at the physical and psychological effects of aging, in the context of retirement; examines the experience of nothingness that single-minded careerists often feel after retirement; describes the talion principle, a subliminal fear of reprisals; and discusses the ‘edifice complex,’ the wish to leave behind a legacy. The article concludes with suggestions as to how individuals and organizations can develop more effective and humane disengagement strategies.     

Comparing Several Regression Models with Unequal Variances

We consider the problem of comparing k regression models, when the variances are not assumed to be equal. For this problem, the classical F test can lead to misleading results, and there is no simple test which adequately controls the size when the sample sizes are small. For k = 2, the most widely used test is the “weighted F test,” also known as the “asymptotic Chow test.” But this test does not work well for small samples, and various modifications have been proposed in the literature. For k > 2, few tests are available and only the parametric-bootstrap (PB) test of Tian et al. (2009) Tian, L., Ma, C., Vexler, A. (2009). A parametric bootstrap test for comparing heteroscedastic regression models. Communications in Statistics—Simulation and Computation, 38, 1026–1036.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar] controls the size fairly adequately. In this article, we propose three fairly simple F tests which can easily be applied in the general case, k ? 2, and avoid the complications of the PB test. Our simulations indicate that these tests have satisfactory performance. Also, our simulations confirm that the power properties of our proposed tests are similar to the PB test. Therefore, our proposed tests provide simple alternatives to the PB test, which can easily be used by practitioners who may not be familiar with the PB.     

基于货架空间成本共担的不同权力供应链均衡分析

针对产品需求受货架空间与零售价格共同影响的两级供应链,通过比较供应商主导、零售商主导和权力均等三种不同权力结构供应链均衡结果,分析了供应商与零售商共同承担货架空间成本对供应链定价、货架空间分配和利润的影响。研究结果表明:供应商与零售商共同承担货架空间成本会减少供应商主导供应链的整体利润,但会使零售商主导和权力均等供应链通过分配更多的货架空间增加产品销量,在一定范围内使得供应链整体利润得到提高。由于三种不同权力结构供应链均未达到整体最优,提出了基于货架成本共担的收入共享合同,并给出了供应商和零售商均能接受的分配方案。     

Developing a remanufacturing supply chain management system: a case of a successful truck engine remanufacturer in China

Abstract

With the yearly increase in end-of-life products, remanufacturing has been recognised as an effective approach to alleviate resource scarcity in China. However, uncertainties exist through a whole remanufacturing supply chain management (RSCM) system, especially for the supply of used products and the demand of remanufactured products. Such uncertainties bring big challenges for a remanufacturer to manage its supply chains. SINOTRUCK Jinan Fuqiang Power Co., Ltd. (JFP), the only one member of Production Engine Remanufacturers Association (PERA) in Asia, has produced remanufactured engines and parts for more than two decades. This paper describes the JFP and its RSCM system. After summarising experiences of JFP’s remanufacturing practices, the paper analyses challenges and then introduces possible solutions. The results show that JFP should make efforts in three areas which are (1) continuous technology development, (2) improvement of the RSCM system and (3) advertising and the continuous technology development is the core competitive factor for JFP.     

A revision of the tukey multiple comparisons procedure to control the probability of committing at most one type i error

Halperin et al. (1988) suggested an approach which allows for k Type I errors while using Scheffe's method of multiple comparisons for linear combinations of p means. In this paper we apply the same type of error control to Tukey's method of multiple pairwise comparisons. In fact, the variant of the Tukey (1953) approach discussed here defines the error control objective as assuring with a specified probability that at most one out of the p(p-l)/2 comparisons between all pairs of the treatment means is significant in two-sided tests when an overall null hypothesis (all p means are equal) is true or, from a confidence interval point of view, that at most one of a set of simultaneous confidence intervals for all of the pairwise differences of the treatment means is incorrect. The formulae which yield the critical values needed to carry out this new procedure are derived and the critical values are tabulated. A Monte Carlo study was conducted and several tables are presented to demonstrate the experimentwise Type I error rates and the gains in power furnished by the proposed procedure     

Simple and Exact Empirical Likelihood Ratio Tests for Normality Based on Moment Relations

The empirical likelihood (EL) technique is a powerful nonparametric method with wide theoretical and practical applications. In this article, we use the EL methodology in order to develop simple and efficient goodness-of-fit tests for normality based on the dependence between moments that characterizes normal distributions. The new empirical likelihood ratio (ELR) tests are exact and are shown to be very powerful decision rules based on small to moderate sample sizes. Asymptotic results related to the Type I error rates of the proposed tests are presented. We present a broad Monte Carlo comparison between different tests for normality, confirming the preference of the proposed method from a power perspective. A real data example is provided.