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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.

Interorganizational partner selection decisions are plagued with uncertainty. When making partnering decisions, firms strive to answer two questions: does the prospective partner have resources which can be used to generate value in the relationship; and will the partner be willing to actively share these resources and cooperate in good faith? Answers to these questions help reduce three types of uncertainty – partner capability uncertainty, partner competitiveness uncertainty and partner reliability uncertainty. For a relationship to benefit both partners, they have to possess complimentary resources of comparable quality, avoid explicit competition as well as be willing to engage in the cooperative behaviors within the confines of their relationship. In this paper, we examine the importance of prospective partners’ characteristics (differences in size, status and specialization) as well as their network characteristics (existence of a common partner and membership in the same clique) to the formation and longevity of their social relationships, as these characteristics reduce firms’ value generation and partner reliability uncertainty.

Purpose: This chapter aims: (a) to extend biased net models of homophily to complete networks; (b) to extend the scope of application of these models to processes of social exchange in a small-group laboratory setting; and (c) to link the theoretical model of attraction and repulsion with a standard statistical model of logistic regression as a way of estimating and evaluating the model.

Methods: We discuss the logic of biased net theory and show how it leads to formal mathematical models of tie formation and tie renewal under mechanisms of attraction and repulsion. We then estimate key theoretical parameters in the models by means of logistic regression.

Findings: The estimated effects of homophily in our models are moderate in strength, weaker than corresponding reciprocity effect, and processes of tie formation and tie renewal are driven more by considerations of direct reciprocity than group membership. Under attraction, homophily effects are stronger for tie renewal than tie formation. Under repulsion, the opposite holds.

Limitations: Participants in our study are divided into two groups based on a criterion that is likely to have been too weak to induce strong group identity. Measures that enhance the sense of group identity need to be introduced in future studies.

This paper aims to present inter-firm networks in China by examining the impacts of previous market ties, nonmarket ties, and more importantly their interaction on the formation of exchange relationships.

The authors test their hypotheses using inter-firm exchange relationships between 19 automakers and 312 suppliers in China. The authors conducted empirical tests with multilevel logit model.

The authors find that both previous nonmarket ties and market ties have positive impacts on the formation of the next exchange relationships, while market ties and nonmarket ties are substitutes in the exchange relationships formation.

This paper provides unique theoretical framework on how firms in emerging markets promote the knowledge exchange with help of market and nonmarket ties. Especially, our findings on the substitute effects between networks have important practical implications to understand the historical development of exchange relationship in transition economies, such as in China.

If social capital is understood as the ability to access resources through social ties, it is clearly important to understand how people form social ties and what types of ties they form. Research has sought to do this, but it has seldom directly examined how organisations shape these processes and outcomes. The paper aims to discuss this issue.

In-depth, comparative case study research was conducted at two voluntary sport organisations in the UK, involving 23 in-depth interviews and participant observation over a 15-month period.

The case studies showed how key organisational practices structured, in meaningful ways, people’s opportunities for interaction and the nature of that interaction, shaping the ways in which they formed ties and exchanged resources. The organisations fostered the formation of both strong and weak ties, but also “compartmentally intimate” ties.

The research challenges individualistic, rational choice accounts of tie formation, highlighting the role of organisations as brokers. In addition, interviewees’ accounts challenge well-accepted distinctions between strong and weak ties, by demonstrating the importance of ongoing, context-specific interaction.

This research offers a rare, direct insight into the role of organisations in shaping people’s ongoing social relationships. In doing so, it problematises existing conceptualisations of social capital and social ties and highlights an alternative, organisationally embedded, process-based perspective on social capital.

Inter-organizational alliances and the networks they generate have been a central topic in organization theory over the last decade. However, network analyses per se have been static. Even when information over time has been available, the temporal component has been set aside or aggregated to the end point of the study. Substantially more research has been conducted on organizations initiating inter-organizational relationships. The organization-level research has been decidedly dynamic in nature. However, organization-level research has largely examined the structural characteristics of the networks generated by organizational actions. Work combining network-level and organization-level phenomena has been rare and, to our knowledge, no research including the effects of organization-level actions on the evolution of network-level phenomena has occurred.

In this chapter we use more than 6000 R&D alliances and more than 6500 M&D alliances initiated by more than 1000 biotech firms in the U.S. over a 30 year period to construct quarterly networks. We test 13 hypotheses linking the actions of the firms to changes in network structure. Utilizing hazard-rate models we test the effects of institutional status, positional status (centrality), and structural status (coreness) of firms on their propensity to form ties with different structural consequences. Our research indicates that both R&D and M&D networks in U.S. biotechnology are developing a distinct core/periphery structure over time. Furthermore, we find support for a process of preferential attachment wherein organizations are more likely to form ties with organizations of similar institutional and structural status. Furthermore, we find evidence for cross effects, for example attachment processes that enfold across the two networks.

This paper aims to describe the personal information and help networks of people with HIV/AIDS (PHAs) in rural Canada, and to present a research‐based model of how and why these networks developed. This model seeks to consider the roles of PHAs, their family members/friends and formal health systems in network formation.

In‐depth, semi‐structured interviews were conducted with 114 PHAs, their friends/family members (FFs) and formal caregivers in three rural regions of Canada. A network solicitation procedure elicited PHAs' HIV/AIDS information/help networks. Interviews were analyzed qualitatively, and network data were analyzed statistically. Documents describing health systems in each region were also analyzed. Analyses used social capital theory, supplemented by stress/coping and stigma management theories.

PHAs' HIV/AIDS‐related information/help networks emphasized linking and bonding social capital with minimal bridging social capital. This paper presents a model that explains how and why such networks developed. The model shows that networks grew from the actions of PHAs, their FFs and health systems. PHAs experienced considerable stress, which led them to develop information/help networks to cope with HIV/AIDS – both individually and collaboratively. Because of stigmatization, many PHAs disclosed their illness selectively, thus constraining the size and composition of their networks. Health system actors created network‐building opportunities for PHAs by providing them with care, referrals and support programs.

This study describes and explains an understudied type of information behavior: information/help network development at individual, group and institutional levels. As such, it illuminates the complex dynamics that made individual acts of interpersonal information acquisition and sharing possible.

This paper introduces “virtual fun at the virtual workplace” and conceptualizes its impact on virtual socialization and the formation of virtual professional ties. The conceptual model also recognizes the moderation of a few variables: “awareness of being observed,” “diversity in the virtual workplace” and “virtual impression management.”

The paper takes a theoretical approach to develop a conceptual framework of virtual fun in the virtual workplace, drawing on social exchange theory (SET) and social network theory (SNT).

The study extends the tenets of the SET and extends the applicability of SNT to a virtual workplace. The study suggests that managers should introduce semi-organized virtual fun during scheduled breaks within work hours to aid in virtual socialization, which further aids in the formation and strengthening of “professional ties” in the virtual workplace.

This study is the first of its kind to conceptualize a model for virtual fun in the virtual workplace.

Although the differential roles of political and business ties are recognized in the literature, the interplay between political and business ties remains unclear. This study aims to explore how political ties affect the formation of business ties with unfamiliar partners by analyzing how a buyer’s political ties affect the market-based selection of suppliers, an important channel through which the buyer forms business ties with unfamiliar suppliers.

A survey of 204 Chinese manufacturing firms was conducted to elucidate the relationship between political ties and the market-based selection of suppliers.

The findings suggest that buyers with strong political ties are more likely to engage in the market-based selection of suppliers; this positive relationship is diminished when social control is preferred over contractual control in the buyer’s supplier governance and is enhanced when technological uncertainty is high.

First, this study sheds light on the interplay between political and business ties by revealing how the buyer’s political ties affect the formation of business ties with unfamiliar suppliers, as represented by the market-based selection of suppliers. Second, it uncovers the boundary conditions of the effect of political ties by revealing the moderating effect of social control preference and technological uncertainty. Third, it extends the interorganizational governance structure literature from its focus on the complement-substitute debate on social control and contractual control to examine the contingent effect of a hybrid governance structure.

This paper aims to investigate the extent professionals from the vocational sector are networked individuals. The authors explore how professionals use their personal networks to engage in a wide variety of learning activities and examine what social mechanisms influence professionals’ agency to form personal informal learning networks.

This study applied a mixed-method approach to data collection. Social network data were gathered among school professionals working in the vocational sector. Ego-network analysis was performed. A total of 24 in-depth, semi-structured, qualitative interviews were analyzed.

This study found that networked individualism is not represented to its full potential in the vocational sector. However, it is important to form informal learning ties with different stakeholders because all types of informal learning ties serve different learning purposes. The extent to which social mechanisms (i.e. proximity, trust, level of expertise and homophily) influence professionals’ agency to form informal learning ties differs depending on the stakeholder with whom the informal learning ties are formed.

This study excludes the investigation of social mechanisms that shape learning through more impersonal virtual learning resources, such as social media or expert forums. Moreover, the authors only included individual- and dyadic-level social mechanisms.

By investigating the social mechanisms that shape informal learning ties, this study provides insights how professionals can be stimulated to build rich personal learning networks in the vocational sector.

The authors extend earlier research with in-depth information on the different types of learning activities professionals engage in in their personal learning networks with different stakeholders. The ego-network perspective reveals how different social mechanisms influence professionals’ agency to shape informal learning networks with different stakeholders.