Search results

Sleep disturbances, present in more than 90% of major depressive disorder (MDD) patients, are moderated by sex in adult MDD. In particular, slow-wave electroencephalographic activity (SWA; 0.5-4 Hz) accumulation is low and dissipation impaired. This SWA abnormality in depressed adult males does not change with age, suggesting that SWA abnormality appears at early ages. The present study evaluated sex differences in SWA in adolescents with MDD compared to healthy controls. We evaluated regularized sleep-wake schedules at home for 5-7 days, followed by two consecutive nights of sleep EEG recording. The study included 104 participants, 52 symptomatic and depressed subjects (MDD: 20 males and 32 females) and 52 healthy controls (HC: 20 males and 32 females), aged 13-18 years. SWA power and dissipation, and duration and latencies to each Non-Rapid Eye Movement (NREM) sleep period were calculated for each group. Results showed that SWA accumulation in the first NREM period was lower and its dissipation across the night more irregular in MDD males compared to HC males (P<0.009). By contrast, SWA was equivalent in MDD and HC females. In conclusion, as reported in adult MDD, the accumulation and dissipation of SWA was abnormal in depressed adolescents, but only in males. SWA abnormalities in adolescent MDD may relate to different depressive symptoms in females and males. These results underscore the need to develop sex-specific therapies to enhance and restore SWA in depressed adolescents.

The potential for e-commerce is limited by a trust deficit when traders do not interact in a physical, bricks-and-mortar context. The theory of information richness posits that equivocal interactions, such as ones requiring trust, can be facilitated through communication media that transmit multiple cues interactively. This study aims to examine the potential of information-rich virtual worlds to reduce this trust deficit compared with more traditional Web-based e-tailing environments.

Rather than focusing on stated intentions, the authors adopt an experimental approach to measure behaviour. Participants receive performance-related financial incentives to perform trust games in different information-rich treatments that represent three retail environments: a physical environment representing bricks-and-mortar trade, an electronic environment representing Web-based online retailing and a virtual environment representing virtual world retail.

The authors find that the two dimensions of trust significantly differ between the treatments. In particular, as hypothesised, both trustingness and trustworthiness are higher in the virtual than in the electronic environment. However, contrary to the hypotheses, physical trade is not associated with greater trust than virtual trade.

The authors extend previous research by demonstrating how the information richness of the virtual world interface can promote e-commerce by deepening trust between trading partners. This research also complements existing work that approaches product and service interfaces through the lens of servicescapes.

The findings also contribute towards the development of services marketing practice and the design of e-commerce environments.

Much of the work in this space considers purchase intentions and attitudes around trust, whereas this study looks at actual trust behaviour in the virtual space.

The purpose of this paper is to study the influence of user personality and vlaues on the number of connections users make, the number of requests for connections that users give out, and the number of connections invitations users receive.

This is a field study of 179 participants interacting in a novel virtual world. The world’s server logs are used to capture sociometrics about the users and their interaction.

Findings suggest that personality and values influence the number of friends users make and the number of friendship requests users give out, but not the number of friendship invitations users receive. Only one personality trait – conscientiousness – exhibits homophily.

Perosnality and social value orientation have rarely been studied together in information systems (IS) research, despite research showing the two have an impact on IS relevant constructs. The use of server logs for data capture is novel. Avatar friendship is an under-researched concept in IS.

Small sports clubs are the life-blood of particular communities, even though many are under-resourced and have difficulties in operating under an individualistic business model. Although coopetition (simultaneous cooperation and competition) has been recognised as a positive driver of performance, the complexities of this association remain under-researched. Consequently, grounded in resource-based theory and the relational view, the purpose of this current study is to examine the moderating roles of inter-firm conflict and competitive intensity in the coopetition–sales performance relationship.

After undertaking 25 field interviews, survey data were collected from 151 non-mainstream sporting clubs in New Zealand. This setting was ideal, since it hosts high-degrees of cooperativeness and competitiveness. After assessing the statistical data for all major robustness checks (including common method variance and endogeneity bias), the hypothesised and control paths were tested through a hierarchical regression analysis.

Coopetition had a positive relationship with sales performance, but inter-firm conflict yielded a negative interaction effect. Surprisingly, this link was positively moderated by competitive intensity.

Under-resourced entrepreneurs (like those in many small sports clubs) should consider cooperating with their competitors, as these strategies can assist them to improve their sales performance. However, they should be careful when engaging in such activities due to the considerable risk that rival firms could behave opportunistically, which might harm their performance. That being said, owner-managers are advantaged if they operate in sectors where there are lots of competitors because there is increased scope to collaborate with “complementary” and trustworthy rivals that can help them to achieve mutually-beneficial outcomes. Indeed, sporting governing bodies (including those that operate on a non-profit basis) should encourage their members to engage in coopetition due to these positive financial consequences.

This investigation contributes to the extant literature by evaluating the competitive forces affecting the link between coopetition and sales performance. Specifically, new evidence emerges on the circumstances where coopetition is (and is not) a performance-enhancing entrepreneurial strategy. Further, this investigation provides unique insights regarding coopetition among non-mainstream sporting clubs, adding new knowledge to the sports entrepreneurship literature. Moreover, by infusing resource-based theory with the relational view, stronger arguments feature how owner-managers can navigate the paradoxical forces that drive coopetition activities. This study ends with several practitioner implications, alongside a series of limitations and avenues for future research.

The article aims at examining the ethical limits and risks of servant leadership. During the Second World War, the German army officer Colonel Claus von Stauffenberg is a loyal servant to his nation and homeland. But when he learns about the Nazis’ mass murders and crimes, he begins to have doubts about whom he should serve. Being confronted with numerous moral dilemmas, he finally decides to join a resistance group. Of course, Stauffenberg's situation as colonel and leader was an extreme case. Time and again, however, managers and leaders are faced with similar dilemmas. Indeed, the current COVID-19-crisis shows that even today’s leaders are repeatedly faced with almost insoluble dilemmas. The recent literature about ethics and leadership suggests a philosophy which is almost portrayed as a panacea to any ethical issues: servant leadership (SL). This study, however, questions the commonly held view that SL is always ethical. The purpose of our historical case study is twofold. First, this study explores the ethical challenges Stauffenberg (and other officers) faced and how they dealt with them. Second, this study elaborates on what responses (if any) SL would provide to these challenges.

The applied method is a historical case study, in which the authors draw on a plethora of secondary literature, including books, reports, and articles.

By analyzing the historical case of “Operation Valkyrie,” this study elaborated and identified risks and limitations of SL and pointed out ways to address these risks. In particular, SL poses risks in the case of a too narrow understanding of the term “service.”

While other leadership styles, e.g. transformational leadership or charismatic leadership, have been extensively studied with regard to ethical risks, in the case of SL possible risks and limitations are still largely unexplored.

Communications regarding this column should be addressed to Mrs. Cheney, Peabody Library School, Nashville, Term. 37203. Mrs. Cheney does not sell the books listed here. They are available through normal trade sources. Mrs. Cheney, being a member of the editorial board of Pierian Press, will not review Pierian Press reference books in this column. Descriptions of Pierian Press reference books will be included elsewhere in this publication.

Over the past twenty years, the management of F. Hoffman‐La Roche, a Swiss multinational pharmaceutical and chemical producer, has developed a comprehensive process for the analysis of important investment decisions. This process has evolved gradually and naturally, according to management needs and readiness. Today it embodies a full range of decision and risk analysis procedures, which allow rapid but thorough quantitative evaluations of important investment, business development and strategy decisions. The results of this analytical process are routinely presented to top management. In addition, the quantitative evaluation is actively sought out by line managers and functional experts throughout the company.

As the commercial activities undertaken by companies have a deeper impact on our lives, it has been recognised as increasingly important to control corporate activities. Control is provided by the criminal law and by statutory or quasi statutory regulation whose purpose is to outlaw corporate activity considered unacceptable in order to protect employees, the environment, investors, or other sections of the general public.

Nobody concerned with political economy can neglect the history of economic doctrines. Structural changes in the economy and society influence economic thinking and, conversely, innovative thought structures and attitudes have almost always forced economic institutions and modes of behaviour to adjust. We learn from the history of economic doctrines how a particular theory emerged and whether, and in which environment, it could take root. We can see how a school evolves out of a common methodological perception and similar techniques of analysis, and how it has to establish itself. The interaction between unresolved problems on the one hand, and the search for better solutions or explanations on the other, leads to a change in paradigma and to the formation of new lines of reasoning. As long as the real world is subject to progress and change scientific search for explanation must out of necessity continue.

Today, most organisations are using packaged software for their key business processes. Enterprise resource planning, supply chain management, customer relationship management and electronic commerce systems enable organisations to improve their focus of using information systems to support their operational and financial goals. This article argues that the need to integrate these packaged software applications with each other as well as with existing or legacy business applications drives the need for a standardised integration architecture to more flexibly implement new business processes across different organisations and applications. To illustrate the components of such an architecture, a case study undertaken at the Robert Bosch Group provided necessary empirical evidence. The Robert Bosch Group has evaluated different enterprise application integration (EAI) systems to achieve a standardised integration architecture. The article describes a reference architecture and criteria for the classification of EAI systems which are derived from different integration approaches.