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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.

Homophily, or the tendency for individuals to be attracted to those who resemble them, is significantly influential in the formation of startup founding and top management teams. But its role in subsequent stages of startup growth remains largely unclear. We consider the impact of homophily on matching of early workers to startups. We propose that, in the case of underrepresented minority groups, the tendency toward homophily plays an important role in this matching process, albeit in an asymmetric way. In particular, homophily exerts a stronger influence on the supply than the demand side: job candidates are more inclined to favor startups with demographically similar founders than startup founders are inclined to favor demographically similar job-seekers. Focusing on an important group of historically disadvantaged workers – women – we examine these arguments using unique data on the online recruiting of high-tech startups concentrated in the Silicon Valley. We find evidence suggesting that female candidates' propensity to apply to a job at a given startup increases with the proportion of female founders. However, startups with a higher proportion of female founders are not more likely than other startups to favor female candidates in personnel selection.

The early institutional theory literature highlighted religion as a core societal institution that influences the behaviours of individuals and organisations. Yet to date, religion has remained relatively unexplored in the management and organisational theory literature. This chapter draws on the idea of homophily – similarity breeds connection to explore a peculiarly instructive case focussing on how religion might influence employees’ trust in the CEO in the Nigerian context – generally assumed to be a religious society. The qualitative study employed a multiple case study design with 40 interviewees from two private sector organisations. The study found religion to be instrumental in developing trust relationships. However, contrary to the idea of homophily, it is not religious similarities per se that influence employees’ trust in the CEOs. Instead, employees’ trust is predicated upon them attributing inherent to the CEOs. Therefore, the study provides theoretical and practical insights into how institutional logics, specifically religious logic, influence employees’ behaviours.

Recent labor market research has called into question whether social capital effects are causal, or are spuriously due to the influence of social homophily. This essay adopts the demand-side perspective of organizations to examine the causal status of social capital. In contrast with supply-side approaches, we argue that homophily is a key mechanism by which organizations derive social capital. We develop an approach to bolster inferences about the causal status of social capital, and illustrate these ideas using data from a retail bank.

Drawing upon Cabrera and Thomas-Hunt's (2006) theoretical framework for the advancement of executive women, we identify gender differences in social networks as an important determinant of the relative perceived credibility of men and women and the opportunities for hire and promotion available to them. A review of the existing research literature on gender and social networks is presented and several potentially fruitful avenues for future research in this area are discussed.

The social and cultural duality perspective suggests dual ordering of interpersonal ties and cultural similarities. Studies to date primarily focus on cultural similarities in interpersonal dyads driven by principles such as homophily and contagion. We aim to extend these principles for sociocultural networks and investigate potentially competing micro-principles that generate these networks, taking into account not only direct dyadic overlap between interpersonal ties and cultural structures, but also the indirect interplay between the social and the cultural.

The empirical analysis utilizes social and semantic network data gathered through ethnographic studies of five creative organizations around Europe. We apply exponential random graph models (ERGMs) for multiplex networks to model the simultaneous operation of several generative principles of sociocultural structuring yielding multiplex dyads and triads that combine interpersonal ties with meaning sharing links.

The results suggest that in addition to the direct overlap of shared meanings and interpersonal ties, sociocultural structure formation is also affected by extra-dyadic links. Namely, expressive interpersonal ties with common third persons condition meaning sharing between individuals, while meaning sharing with common alters leads to interpersonal collaborations. Beyond dyads, the dual ordering of the social and the cultural thus operates as asymmetrical with regard to different types of interpersonal ties.

The paper shows that in addition to direct dyadic overlap, network ties with third parties play an important role for the co-constitution of the social and the cultural. Moreover, we highlight that the concept of network multiplexity can be extended beyond social networks to investigate competing micro-principles guiding the interplay of social and cultural structures.

While land management can be a subject of conflict in places where the composition of landowners is socially and culturally diverse, it also holds the potential of bringing landowners together across social groups. This chapter uses the case of a peri-urban area near Copenhagen, Denmark, to examine the relations landowners have through their use and management of land within and across social groups. To elaborate the analysis and discussion of social groups, social coherence and fragmentation, this chapter introduces the concepts of homophily and self-categorisation. Interviews with 40 landowners from two parishes addressed four types of land-based relations: (1) exchange of help and services; (2) debate of farming/management; (3) shared interests and (4) friendship. While the pattern of relations overall supported the idea that people interact more with their own social group, the analysis also showed areas of interaction across groups as well. Three overall themes summarise important areas of cohesion/fragmentation: (1) Rented land and contracting, (2) Common interests between landowners including hunting, farming and horses, (3) Urgency and geographic proximity.

Empirical studies show substantial variation across immigrants in the rate and direction of assimilation along various dimensions (e.g., cross-ethnic contact, language, identity). To explain this variation, past research has focused on identifying exogenous factors, such as discrimination, human capital, and settlement intention. In this chapter we argue that variation in immigrant outcomes emerges endogenously through positive interaction effects between dimensions of assimilation. We propose a new assimilation model in which processes of social influence and selection into congruent social environments give rise to multiple long-term equilibria. In this model, migrants who are already assimilated along many dimensions tend to also adapt along other dimensions, while less assimilated migrants become more strongly embedded in their ethnic group.

To test the assimilation model, we derive a number of hypotheses, which we evaluate using trend analysis and dynamic panel regression on data from the Longitudinal Survey of Immigrants to Canada.

The data mostly confirm the hypotheses, providing overall support for the assimilation model.

Our theory and findings suggest that immigrants would follow divergent assimilation trajectories even in the absence of a priori population heterogeneity in external factors.

The positive interaction effects between cultural and structural dimensions of assimilation suggest that mixed policies that promote integration while seeking to prevent loss of identity go against the natural tendency for cultural and structural assimilation to go hand in hand.

The present chapter proposes a novel model of immigrant assimilation and an empirical test.

Institutional support at local, state, and national levels, including the services offered by business incubators, impacts women entrepreneurs’ venture creation and success. Yet, our understanding about the influence of an incubator’s attributes on women entrepreneurship remains limited. In this chapter, we develop a framework to analyze how incubator attributes encourage women’s entrepreneurship in the USA. We begin by discussing how homophily and signaling theories can help us understand whether incubators are using inclusive practices. Then, we draw a sample of 30 Impact Award winners from the International Business Incubation Association (InBIA), a global association of incubators, and we use three sources of data for our analysis and conclusions: incubator features and demographics, mission statements, and media coverage from Nexis Uni. Based on our findings, we find low levels of gender inclusive practices among the most impactful business incubators. We conclude by offering suggested practices to make business incubators more inclusive of women entrepreneurs.