Constance A. Mara  Robert A. Cribbie 《统计学通讯:模拟与计算》2013,42(10):1928-1943

Equivalence tests are used when the objective is to find that two or more groups are nearly equivalent on some outcome, such that any difference is inconsequential. Equivalence tests are available for several research designs, however, paired-samples equivalence tests that are accessible and relevant to the research performed by psychologists have been understudied. This study evaluated parametric and nonparametric two one-sided paired-samples equivalence tests and a standardized paired-samples equivalence test developed by Wellek (2003 Wellek , S. (2003). Testing Statistical Hypotheses of Equivalence . New York : Chapman & Hall/CRC. [Google Scholar]). The two one-sided procedures had better Type I error control and greater power than Wellek's test, with the nonparametric procedure having increased power with non normal distributions.  相似文献   

    

Robert L. Mason  Youn-Min Chou  John C. Young 《统计学通讯:理论与方法》2013,42(12):2128-2145

Wilks’ ratio statistic can be defined in terms of the ratio of the sample generalized variances of two non-independent estimators of the same covariance matrix. Recently this statistic has been proposed as a control statistic for monitoring changes in the covariance matrix of a multivariate normal process in a Phase II situation, particularly when the dimension is larger than the sample size. In this article we derive a technique for decomposing Wilks’ ratio statistic into the product of independent factors that can be associated with the components of the covariance matrix. With these results, we demonstrate that, when a signal is detected in a control procedure for the Phase II monitoring of process variability using the ratio statistic, the signaling value can be decomposed and the process variables contributing to the signal can be specifically identified.  相似文献   

    

Robert L. Mason  Youn-Min Chou  John C. Young 《统计学通讯:理论与方法》2013,42(5):942-957

A control procedure is presented in this article that is based on jointly using two separate control statistics in the detection and interpretation of signals in a multivariate normal process. The procedure detects the following three situations: (i) a mean vector shift without a shift in the covariance matrix; (ii) a shift in process variation (covariance matrix) without a mean vector shift; and (iii) both a simultaneous shift in the mean vector and covariance matrix as the result of a change in the parameters of some key process variables. It is shown that, following the occurrence of a signal on either of the separate control charts, the values from both of the corresponding signaling statistics can be decomposed into interpretable elements. Viewing the two decompositions together helps one to specifically identify the individual components and associated variables that are being affected. These components may include individual means or variances of the process variables as well as the correlations between or among variables. An industrial data set is used to illustrate the procedure.  相似文献   

    

Julie Gedro  Robert C. Mizzi  Tonette S. Rocco  Jasper van Loo 《Human Resource Development International》2013,16(3):282-297

The world of work has regularized the practice of people moving from one country to another to accept job assignments. Travel and relocation are stress-laden endeavours. For LGBT people, the risks can be more complicated than they are for heterosexuals. This article explores particular challenges that LGBT people face when they travel and relocate for business, both domestically and internationally. The article is contextualized with a literature review on sexual minorities and workplace issues, and uses auto-ethnographic stories of three of the authors’ lived experiences as sexual minorities relocating for professional reasons in order to examine issues related to LGBT relocation. These issues include legal, social, cultural and familial considerations. Implications and suggestions for human resource developers are presented, which include acquiring awareness around the psychological and physiological reactions to new and diverse ecologies, or ‘eco-shocks’.  相似文献   

    

Robert L. Engle  Kerri Anne Crowne 《Human Resource Development International》2013,16(1):30-46

The objective of this study is to examine the impact of a short-term international experience, which is designed to address the conditions outlined in Allport’s (Allport, G.W. 1954. The Nature of Prejudice. New York: Perseus Book Group) contact hypothesis, on each of the four factors which make up cultural intelligence (CQ). A sample of 135 university students was broken up into test and control groups. The results for the test group suggest that the short-term experience ranging from 7 to 12 days within a structured study abroad service programme, including modest pre-trip preparation, found a significant increase in each of the four factors of CQ. At the same time, there was no significant change in the control group. Implications for human research development research and practice as well as limitations and suggested areas for future research are discussed.  相似文献   

    

Robert G. Hamlin  Mona Nassar  Khaled Wahba 《Human Resource Development International》2013,16(1):45-64

This paper reports the results of a study of managerial and leadership effectiveness carried out within an Egyptian public sector hospital in which concrete examples of ‘effective’ and ‘least effective/ineffective’ manager and managerial leader behaviour, as observed by superiors, peers and subordinates, were collected using the critical incident technique. These critical incidents were then content analyzed to identify a smaller number of discrete behavioural statements and criteria of effectiveness. The paper also reports the results of a subsequent comparative analysis of these Egyptian findings against equivalent behavioural criteria that emerged from studies in two different British NHS Trust hospitals. This latter multi-case/cross-nation study revealed high degrees of overlap, commonality, and relative generalization across all three organizations. The results lend strong empirical support to those who believe in ‘generic’ and ‘universalistic’ explanations of the nature of managerial and leadership effectiveness.  相似文献   

    

Olivier Gossner  Ehud Kalai  Robert Weber 《Econometrica : journal of the Econometric Society》2009,77(4):1317-1328

In Bayesian environments with private information, as described by the types of Harsanyi, how can types of agents be (statistically) disassociated from each other and how are such disassociations reflected in the agents' knowledge structure? Conditions studied are (i) subjective independence (the opponents' types are independent conditional on one's own) and (ii) type disassociation under common knowledge (the agents' types are independent, conditional on some common‐knowledge variable). Subjective independence is motivated by its implications in Bayesian games and in studies of equilibrium concepts. We find that a variable that disassociates types is more informative than any common‐knowledge variable. With three or more agents, conditions (i) and (ii) are equivalent. They also imply that any variable which is common knowledge to two agents is common knowledge to all, and imply the existence of a unique common‐knowledge variable that disassociates types, which is the one defined by Aumann.  相似文献   

    

Sriram Narayanan  Ann S. Marucheck  Robert B. Handfield 《决策科学》2009,40(1):121-163

For nearly two decades, electronic data interchange (EDI) has been widely viewed as a technology pivotal to supply chain management that has also provided benefits to firms on multiple levels. Despite a substantial body of literature, there are a number of conflicting and inconclusive research results in this field. In this study, we synthesize the diverse body of research in EDI by organizing the literature into an initial theoretical framework. Based on a meta‐analysis of results from the empirical literature, we seek to clarify conflicting results from the literature in order to develop a more unified theoretical framework of contextual variables associated with EDI adoption factors and outcomes. From a managerial standpoint, our literature‐based framework offers a set of guidelines for making successful EDI adoption and implementation decisions.  相似文献   

    

Su‐Yol Lee  Robert D. Klassen 《Production and Operations Management》2008,17(6):573-586

The limited capabilities and resources available within many small‐ and medium‐sized enterprises frequently hamper an effective response to environmental pressures, which in turn hurts large buying firms (i.e., customers). Using a case study method with multiple suppliers of two large buying firms, we mapped factors that initiated and improved environmental capabilities in small‐ and medium‐sized enterprises over time. Through several specific mechanisms, buyers' green supply chain management initiated and then enabled the improvement of suppliers' environmental capabilities. Independent of buyers, internal championing of environmental concerns also provided an impetus for small‐ and medium‐sized enterprise suppliers to acquire resources outside the supply chain. Thus, synergistic linkages emerged in supportive buyer‐supplier relationships, resource acquisition, and capability development. When these findings are combined with earlier research on larger suppliers, an integrative framework emerges that provides direction for suppliers, buyers, and public agencies seeking to improve environmental performance.  相似文献   

    

Bryan Dennis  Robert S. D'Intino  Jeffery D. Houghton  Christopher P. Neck  Trish Boyles 《Global Business and Organizational Excellence》2008,27(2):26-41

The most commonly employed theories of corporate social performance (CSP) tend to ignore firm‐level processes and structures as sources of competitive advantage. But, by taking a resource‐based view (RBV), and by enhancing a firm's capability to engage in socially responsible activities, it can potentially create its own competitive advantages. We examine four major components of CSP—community relations, the environment, diversity, and employee relations. And we show that the ability of a firm to develop its knowledge and skills—as well as policies and implementation plans and procedures—in each of these areas is a potential resource that may in fact provide competitive advantages and higher organizational performance, bringing benefits to both society and the firm. The community dimension evaluates the firm's performance in relationship to philanthropic giving and community support. The environmental aspect considers such firm stewardship activities as pollution prevention, global warming, and recycling. The diversity component measures CSP considering such factors as board member diversity and a firm's hiring, evaluation, training, and promotion policies concerning women and minorities. The employee relations dimension examines such socially responsible human resource practices as innovative employee involvement programs and profit sharing. Together, these capabilities can provide tangible and intangible resources that can provide the firm with competitive advantages. © 2008 Wiley Periodicals, Inc.  相似文献