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From the structural perspective of social‐capital theory, this research investigates how a team's social‐network relationships affect its performance. More specifically, it concerns the type of work‐group‐internal connectedness in instrumental and expressive networks that is associated with enhanced team performance, and whether knowledge mediates these effects.

The research was survey based, involving 76 work teams and a total of 499 employees in 48 organisations. The work teams carried out fairly knowledge‐intensive but only moderately complex tasks, some of which were routine in nature.

Both dense and fragmented instrumental‐network structures affect work‐team performance. However, fragmentation in expressive networks has a negative impact. Furthermore, the mediation results give empirical support to the implicit understanding that only instrumental networks transfer knowledge, especially if they are dense.

The results indicate that social‐network relationships affect team performance and also provide access to social capital (here knowledge). However, instrumental and expressive networks differ in terms of theoretical and practical implications. Future research could overcome the limitations of this study through increasing the sample size and focusing on much more fine‐grained intervening mechanisms (here knowledge sharing).

The recommendation to managers is to stimulate dense instrumental relationships in order to facilitate knowledge sharing and avoid overly fragmented expressive relationships.

First, in examining the social structure of both instrumental and expressive relationships this study responds to the growing call in organisational theory for research into the social content of social networks. Second, the contribution of this research paper lies in directly testing whether team knowledge mediates the effects of advice‐network structures on team performance.

The aim of this study is to explore the role of social tie content in the interpersonal knowledge transfer process and to test the effects of different social ties, i.e. distinguishing instrumental tie and expressive tie, on knowledge transfer, using cognition‐ and affect‐based trust as the mediators.

A theoretical model was tested through a survey carried out on 152 MBA students of a university in east China, and structural equation modelling (SEM) was employed for data analysis.

This research proved that both instrumental and expressive ties will facilitate trust and knowledge transfer. Cognition‐based trust is not essential when low‐tacit, general knowledge is transferred, and the effect of the expressive tie becomes negative when trust is controlled. When transferring general knowledge the instrumental tie is more efficient. However, contrary to the hypothesis, it is found that the effect of the expressive tie is not significantly larger than that of the instrumental tie during the tacit knowledge transfer process.

Besides tacitness, future research may consider involving more dimensions of knowledge into the theoretical model. Longitudinal and cross‐national studies are also needed.

The paper suggests that managers can enhance knowledge transfer among co‐workers by enhancing their instrumental and expressive ties. However, overuse of the expressive tie is risky. The importance of trust construction in organizations is also underscored.

The study reminds scholars to pay attention to the role of tie content in knowledge transfer. The findings also help managers to know how to increase knowledge transfer through promoting intra‐organizational networking.

The purpose of this paper is to investigate how four enterprise social media (ESM) affordances (visibility, association, editability and persistence) affect social network ties (instrumental and expressive), which, in turn, influence the in-role and innovative job performance of employees.

A survey of 251 ESM users in the workplace in China was conducted.

All four affordances are positively associated with instrumental ties, yet only the association and editability affordances are positively related to expressive ties. Although instrumental and expressive ties are positively related to in-role and innovative job performance, instrumental ties exert stronger effects on in-role job performance, whereas expressive ties show stronger effects on innovative job performance.

First, additional relevant affordances should be included in an expanded model. Second, future research could examine how patterns of affordances use (unrelated, or hierarchically or sequentially related) affect organizational network ties. Third, there are likely (many) other exogenous factors affecting the model’s relationships. Fourth, the data collected are self-reported.

This study advances the theoretical understanding of the role of ESM affordances in the workplace, especially through their influences on network ties. The findings can guide organizations on how to emphasize ESM affordances to foster instrumental and expressive ties to improve the job performance of employees.

First, it provides novel views on affordance theory in ESM contexts by empirically testing four central affordances, thereby further providing preliminary evidence for prior theoretical propositions by confirming that social media affordances might be associated with or influence relational ties. Second, the study integrates an affordance lens and a social network perspective to investigate employees’ perceived performance behavior. Including social network ties can offer a more detailed understanding of the underlying processes of how ESM affordances can and do affect job performance. Third, it supports the validity of distinguishing instrumental and expressive ties in ESM contexts, thus offering a possible explanation for the inconsistencies in prior research on the impact of social networks on employee outcomes. Finally, it also shows how two kinds of organizational performance (in-role and innovative) are somewhat differentially influenced by affordances and network ties.

Entrepreneurs and individual sellers heavily leverage their social ties embedded in social media, expressive or instrumental, to penetrate the market and achieve business success. However, the extant social commerce literature offers limited understanding on how different forms of buyer−seller social ties embedded in social media affect buyers' purchase behaviors. The study draws on the theoretical lens of social ties and proposes an integrative theoretical framework to understand the direct and indirect influences of expressive and instrumental ties (ExTSM and InTSM) between buyers and sellers on buyers' purchase intention (PI) in social commerce.

The authors first validated the measures of ExTSM and InTSM with survey data from 166 Weibo commerce buyers. They then tested their theoretical framework and hypotheses with survey data from 246 buyer−seller dyads in WeChat commerce.

With a buyer-centric view, (1) ExTSM and InTSM, respectively, had a direct negative and a positive influence on PI; (2) both trust and perceived product value displayed inconsistent mediation effects on the negative relationship between ExTSM and PI; and (3) only perceived product value mediated the positive influence of InTSM on PI. From sellers' viewpoint, (1) their ExTSM and InTSM with buyers were mixed up, and (2) the mingled social ties negatively impacted buyers' purchase intention.

The findings of the study advance the theoretical understanding of social commerce and offer practical guidance for small and medium-sized enterprises to effectively utilize social media for business purposes.

Social networks provide the architecture to facilitate important socio-emotional and task related exchanges within groups. However, researchers have just begun to explore how relationships form in groups comprised of individuals who differ on one or more dimensions. This paper investigates the role of social categorization and social network theories on the formation of social networks within diverse groups. We suggest that each perspective offers an alternative, but incomplete, understanding of how relationships may arise in diverse groups. Specifically, we integrate these two perspectives to provide a more complete understanding of how different types of diversity impact tie formation and allow individuals in diverse groups to achieve their socio-emotional and task-related objectives.

The concept of relationship marketing is established in the general management and marketing literature. Almost all of the thinking and practice has emanated exclusively from marketing scholars and practitioners. A contribution towards better understanding the communication issues is presented by re‐considering the nature of managed human communication as a fundamental management function, and a re‐consideration of the social nature and function of human relationships. This requires recognition that the field of public relations also deals with relationships. Some implications for individual managers are identified which do not depend on the scgmentalist functional view of marketing as an economic tool of persuasion. As communication occurs within the context of the communicators' multiplex relationships and relational roles, and these relationships define how to interpret the content of communication episodes, business managers can benefit from awareness of the impact of relationship status on the communication process and of communication events on their relationships.

The aim of this exploratory study is to investigate the role of personal networks in supporting academics' professional learning. In particular, the paper examines the composition of academics' networks and the implications of network tendencies for academics' learning about teaching.

The study adopts a mixed-methods approach. Firstly, the composition of academics' networks is examined using social network analysis. Secondly, the role of these networks in academics' learning about teaching is analysed through semi-structured interviews.

Findings reveal the prevalence of localised and strong-tie connections, which could inhibit opportunities for effective learning and spread of innovations in teaching. The study highlights the need to promote connectivity within and across institutions, creating favourable conditions for effective professional learning.

While the study makes a valuable contribution to the literature, the generalisability of these findings is limited, because the sample is restricted to 37 academics. Participants' characteristics and networking behaviours may not be fully representative of academics in a wider range of contexts and settings. Another limitation is that the evaluation of people's learning was limited to self-reported measures. Future research should measure a broader range of evidence related to academics' professional networks.

This study extends the discussion of professional learning in academia in a novel way, by taking a social network perspective. The approach employed attempts to enrich the limited understanding of academics' networks, by unpacking the ways in which academics' personal networks support their learning.

The originality of this work lies in its intent to uncover relationships that condition professional learning and enhancement of teaching practice. Reflection on personal networks can potentially enable individuals to determine the effectiveness of their networks and the significance of their network connections.

Drawing on the theories of social capital and leader–member exchange (LMX), the authors examined the moderated mediation relationships of psychological ownership and perceived supervisory support on social capital and organizational knowledge.

To test the proposed model, the authors collected data from 522 employees working in large corporations in South Korea.

The authors found that (a) social capital was positively related to organizational knowledge sharing, (b) perceived supervisor support mediated the linkage between social capital and knowledge sharing and (c) psychological ownership moderated the indirect effect of social capital on knowledge sharing through perceived supervisor support, such that the indirect effect was stronger for employees with low rather than high psychological ownership.

This study sheds new light on how the nature of relationship between the leader and followers as well as individual's psychological ownership play a crucial role in knowledge sharing.

The purpose of this study is to answer whether and how supervisor–subordinate instrumental or expressive ties based on enterprise social media (ESM) might enhance employee performance.

Drawing on social exchange theory, this study developed a theoretical model to explore the influencing mechanism of different supervisor–subordinate ties based on ESM on employee job performance. The model was empirically tested through 219 ESM users.

The results revealed that supervisor–subordinate instrumental ties based on ESM play a positive role in employee job performance, while supervisor–subordinate expressive ties based on ESM are not significantly related to employee job performance. Supervisor–subordinate instrumental ties and expressive ties based on ESM can positively influence employee job performance through the mediating effect of organizational trust. Besides, perceived performance climate can weaken the relation of organizational trust to job performance, and then weaken the indirect relations via the mediating of organizational trust.

Our findings advance the understanding of ESM use through various underlying mechanisms and have the potential of guiding organizations to fine-tune their social media usage strategies.

This study aims to explore whether and how task characteristics affect employee agility in the context of enterprise social media (ESM).

Adopting the social network ties perspective, this study examines how task characteristics (i.e. task complexity, task interdependence and task non-routineness) affect employee agility by promoting their social network ties (i.e. instrumental ties and expressive ties) and how ESM visibility moderates their relationships. Data gathered from 341 ESM users in workplaces were analyzed using Smart-PLS 3.2.

First, task complexity, task interdependence and task non-routineness have positive effects on instrumental and expressive ties, which in turn influences agility; Second, instrumental ties have a stronger effect on employee agility relative to expressive ties; Finally, ESM visibility positively moderates the effects of task complexity and task non-routineness on social network ties.

The findings provide guidance for organizational managers on how to use task characteristics and ESM to improve employee agility, as well as insights for social media designers to optimize ESM functions to improve agility.

This study provides empirical evidence to explain the roles of task characteristics and social network ties in influencing employee agility, thus clarifying the inconsistent findings in extant research. The moderating effects of ESM visibility on the relationships between task characteristics and social network ties are also examined, thus providing further insights on the positive role of ESM in organizations.