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We explore the interplay between homophilic preferences, reciprocity, and societal values in the formation of venture capital investment syndicates in China. Both Chinese and U.S. syndicate lead firms generally prefer including their fellow compatriot firms over comparable non-compatriots in the investment syndicates that they assemble. When a Chinese firm initiates a collaborative first move by including a U.S. firm in an investment syndicate, however, the U.S. firm no longer prefers comparably familiar U.S. firms over the Chinese firm when it subsequently chooses among prospective syndicate partner firms to include in its investment syndicates. In such cases, familiarity triggers impartiality; the experiential trust that was garnered from the collaborative first-move engagement initiated by the Chinese firm diminishes the nationality-based homophilic preferences of the U.S. firm. We do not find similar dynamics when the tables are turned. When a U.S. firm initiates a collaborative first move by including a Chinese firm in an investment syndicate, the Chinese firm subsequently remains partial to fellow compatriot firms that are otherwise comparable to the U.S. firm. The homophilic preferences and identity-based trust between Chinese firms grounded in shared nationality are resilient to any goodwill created by U.S. firms when they initiate collaborative first moves. [ABSTRACT FROM AUTHOR]

Heeding the rising popularity of virtual influencers on social media, many established brands are beginning to collaborate with them. Although virtual influencers are perceived as novel and exciting, their effectiveness in different areas of consumer behavior has not been examined. While previous research has compared several attributes of virtual and human influencers, our research is specifically motivated to answer: how can marketers increase the effectiveness of virtual influencers in promoting prosocial causes? Across four experiments employing different prosocial contexts, we compared the effectiveness of virtual and human influencers in increasing consumers' prosocial intentions and behaviors. Findings suggest that although human influencers are more persuasive in promoting prosocial behaviors, this effect only occurs when a virtual influencer is perceived as a standalone influencer (i.e., not affiliated with a brand). Overall, our results imply that marketers can substantially increase the effectiveness of virtual influencers by making the cues of brand affiliation salient in influencers' posts. [ABSTRACT FROM AUTHOR]

Virtual influencers have great potential to shape the audience's perception and motivate behavioral change. Drawing upon anthropomorphism theory and social identity theory, this paper examined the interaction effect of anthropomorphism and racial homophily of virtual influencers in shaping audiences' trust and subsequently pro‐environmental behaviors in low‐ and high‐cost contexts. Two online studies employing experimental materials generated by artificial intelligence were conducted. Study 1 revealed that high anthropomorphism (human‐like virtual influencers) and high racial homophily (local‐like virtual influencers) are more effective for eliciting trust in the context of low‐cost pro‐environmental behaviors. The findings also showed that low racial homophily (foreign‐like virtual influencers) would further weaken the trust level of a virtual influencer in low anthropomorphism (animate‐like virtual influencers). Study 2 aimed to replicate the findings from Study 1 in the context of high‐cost pro‐environmental behaviors. The findings showed that low racial homophily (foreign‐like virtual influencers) enhanced the trust in a high anthropomorphism (human‐like virtual influencers) virtual influencer. The moderated mediation analyses confirmed the hypothesized relationships in the proposed research model. This research advanced our understanding on the moderating role of racial homophily that serves as a cognitive shortcut for low‐cost and quick decisions. However, a low racial homophily (foreign‐like) virtual influencer would be more effective for high‐cost and symbolic pro‐environmental behaviors. These insights provide valuable guidance to businesses, marketers, and environmental advocates aiming to leverage virtual influencers for encouraging sustainability practices. [ABSTRACT FROM AUTHOR]

We explore the role of organizational factors in research collaboration networks among European universities. The study of organizational drivers in shaping collaboration patterns is crucial for policy design aimed at reducing research fragmentation and fostering knowledge creation and diffusion. By using Exponential Random Graph Models (ERGMs) and controlling for spatial factors, we investigate the role of two main mechanisms guiding the partners' selection process: organizational attributes and homophily. We investigate two distinct scientific collaboration networks (i.e., projects and publications) and two research domains (Physical Sciences and Engineering, and Life Sciences) over the 2011–2016 time period. Our empirical evidence reveals that, among the main dimensions indicated by the literature, research capability (measured by the dimension of doctoral programs) has the clearest and most stable impact either on the tendency to establish collaboration ties or as homophily effect. In terms of policy implications, it emerges that organizational similarity in research capability matters and policy makers should consider doctoral programs as a strategic variable to promote successful collaborations in scientific research. [ABSTRACT FROM AUTHOR]

The minority stress model posits an effect of sexual orientation identity on social support and coping among sexual orientation minorities. This assertion compliments the idea that discussion networks are functionally specific (i.e., we talk to the people who can best help with a stressor). This research collects ego-centric discussion networks data from gay and bisexual men to determine (1) whether there are functionally specific networks to address sexuality-related stress, (2) whether those networks buffer the impact of sexuality-related stress on psychological distress, and (3) whether sexual orientation homophily in a functionally specific network moderates the impact of sexuality-related stress or social support on psychological distress. Results indicate the existence of functionally specific networks for both gay and bisexual men. However, increasing homophily in the functional networks only moderated the effects of sexuality-related stress and perceived social support on psychological distress for gay men. [ABSTRACT FROM AUTHOR]

We propose a novel multi‐factor metric of homophily between the CEOs of the acquirer and target firms as a causal determinant of mergers and acquisitions (M&As). We find strong evidence that higher homophily among the two CEOs increases the likelihood of M&A deal initiation and completion. When homophily is high, deals are more likely to be paid in cash, exhibit significantly larger long‐term value creation and are less subject to ex‐ante overpricing as measured by ex‐post goodwill write‐offs. These effects stem from similarity between CEOs creating trust, reducing information asymmetry and facilitating effective communication. Our approach resolves prior conflicting results on the effect of homophily on large corporate decisions and strongly indicates the need for a multi‐dimensional estimation of homophily to obtain conclusive results. [ABSTRACT FROM AUTHOR]

In recent decades, disruptive media events, such as major terrorist attacks, have gained increasing relevance in news coverage around the world. Despite the growing importance of such globally broadcast media events, little research to date has examined cross-national variation in event coverage or the predictors of this variation. This study examines news coverage about the 9/11 terror attacks in the United States across 51 countries to analyze whether the topical focus and emotional tone of news coverage about the attacks varied according to a country's proximity to the United States and the dominant role perceptions of its journalistic culture. We show that these macro-level predictors are associated in varying degrees with the country-level topical focus and emotional tone of reporting over the 30 days following this salient event. Moreover, our analysis also suggests that temporal developments may have uniformly structured much of this worldwide coverage. [ABSTRACT FROM AUTHOR]

This study investigates how China's domestic vaccine crisis in 2018 was politicized within Chinese video content on YouTube. The analysis, employing the Structural Topic Model, uncovered a notable hyper-politicization of the vaccine crisis in video comments, often diverging from the issue frames presented in video titles. Furthermore, inferential network analysis using the Exponential Random Graph Model revealed the hyper-politicized comments can be attributed to 1) the emergence of networked commenters engaging in cross-video commenting practices, and 2) political homophily among video producers, particularly regarding their critical political stance toward China. The findings suggest the networked dynamics of ssue politicization. [ABSTRACT FROM AUTHOR]

While existing research shows why politicians' social media messages spread online, we know comparatively less about the types of individuals who see these messages. The current study tests whether Americans' exposure to posts from political elites is best explained by their partisan allegiance (homophily) or the intensity of their political engagement. To test this question, we employ data from a 2020 Cooperative Election Study module that asks respondents how often they encounter social media posts from various political figures. We find that both homophily and intensity characterize exposure to elite messages: partisans and ideologues not only tend to encounter posts from politicians on their own side of the aisle most often, but they also encounter posts from politicians on the opposite side more often than do independent or moderate respondents. The role of intensity relative to homophily is greatest for posts by former President Donald Trump, which Democrats were more likely to encounter than Republicans or independents. [ABSTRACT FROM AUTHOR]

Substantial recent influxes of immigrants have transformed metropolitan housing markets across Europe, North America, and Australia. Where and under what physical and sociodemographic conditions these new residents and their children live influence their life chances and societal inequalities and cohesion. Using population register data, we estimate conditional logit models of neighbourhood selections jointly stratified by immigrant and income status for nine types of Oslo region families making 'child-salient,' inter- neighbourhood moves. Although homophily is an important driver of residential selection for both native and non-Western immigrant families, its significance pales in comparison to neighbourhood proximity and sectoral constraints in the spatial patterning of housing search. Study findings enhance our understanding of segregation processes and offer new perspectives on social mix housing policies. Social mix should attempt to enhance diversity at the larger spatial scales primarily by improving information about and enhancing access to potentially desirable residential options and countering anti-immigrant perceptions or discriminatory actions by real estate agents or mortgage brokers. [ABSTRACT FROM AUTHOR]

Reem Hilu interviews Wendy Hui Kyong Chun, Simon Fraser University's Canada 150 Research Chair in New Media in the School of Communication, professor of Communication, and director of the Digital Democracies Institute. Chun discusses her work that historicizes the utopian and dystopian framings of digital media and network technologies, focusing on the nature of community, or its absence, online. Throughout the conversation, Hilu and Chun sought to maintain a dialogue between interpretations of contemporary mediated communities online and longer histories through which media have worked to organize connections and associations. [ABSTRACT FROM AUTHOR]

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The British war on woke is an intensive ideological campaign against social justice movements that is mobilising far-right tropes and conspiracy theories within mainstream British political discourse. It sees itself in a battle of good versus evil, reason against the dark forces of pre-modernity, 'Cultural Marxists' and a 'globalist elite' intent on ruining 'western civilisation' and replacing 'white' British culture with woke multiculturalism. The authors examine this campaign's discourses on various digital media including magazines, blogs, news sites and Twitter, and used search engines and a media database to capture a network graph of a community waging its war on woke. Using the graph metric of 'betweenness centrality', they isolate and visualise a small densely inter-connected homophily of political actors who share media platforms and cooperate with think-tanks, campaign groups, and 'educational charities'. Using van Dijk's concept of the ideological square, they explore the conceptual logics driving this campaign to its extreme positions, often justified on the basis of representing the interests of the British white working class. [ABSTRACT FROM AUTHOR]

The mediating role of perceived organizational politics has been examined in this research to determine how homophily affects organizational cynicism and employee loyalty. This research is based on the idea that people feel more comfortable around similar people. Similarities foster a feeling of affinity, leading to the formation of a relationship known as homophily. This principle asserts that individuals who interact tend to share similar attitudes, perspectives, educational backgrounds, and social standings. A quantitative methodology was employed in the current study. The model was verified by analyzing data from 300 respondents using SEM, following the two-step approach proposed by Andersen and Garbing (1988). The findings derived from the administration of survey questionnaires indicate that attitudinal homophily has an indirect adverse influence on organizational cynicism, while simultaneously having a favorable influence on employee loyalty. These effects are mediated by the perceived presence of organizational politics. [ABSTRACT FROM AUTHOR]

Background: Regular physical activity (PA) has many benefits for children and adolescents, yet many do not meet PA recommendations. Social context is important for promoting or discouraging PA among children and adolescents. This review aimed to identify social network variables related to PA among children and adolescents. Methods: A systematic review of the literature was conducted in September 2018 using PsycINFO, MEDLINE, PubMed, and Web of Science. Included articles needed to (1) be focused on children (aged 5–11 y) or adolescents (aged 12–17 y), (2) include a measure of PA, (3) include a measure of egocentric or sociocentric social connection in which alters were nominated, and (4) perform an analysis between network data and PA. Results: A search of 11,824 articles was refined to a final sample of 29 articles. Social network themes and concepts such as homophily, centrality, and network composition were related to child and adolescent PA behavior across the literature. Conclusions: The impact of an individual's social network is evident on their PA behaviors. More research is needed to examine why these networks form in relation to PA and how interventions can utilize social network analysis to more effectively promote PA, especially in underserved and minority populations. [ABSTRACT FROM AUTHOR]

Research Summary: Companies are increasingly opening up decision‐making, involving employees on all levels in distributed—and purportedly "hierarchy‐free"—decision processes. We examine how hierarchy reaches into such "democratized" systems, arguing that it is a source of homophily that biases idea evaluation decisions. Using a data set from internal crowdfunding at one of the world's largest industrial manufacturers, we show that idea evaluators overvalue hierarchically similar others' ideas. Competition in the form of lateral closeness dampens this bias, whereas uncertainty in the form of novelty amplifies this bias. We contribute to the literatures on decision biases in centralized versus distributed innovation and on structural similarity as a driver of employee behaviors. Managerial Summary: Many companies are starting to involve employees on all levels in strategic decisions, so as to curb hierarchical rigidities and integrate multiple perspectives. However, such distributed decision‐making opens the door to new biases and, ultimately, suboptimal strategic decisions. In the context of internal crowdfunding at a large industrial manufacturer, we show that employees evaluate hierarchically similar others' ideas overly favorably. Thus, hierarchy is not just a source of rivalry, but also of identification, leading to favoritism among hierarchical peers. Further, employees are particularly likely to assess ideas based on hierarchical similarity rather than content if the ideas are novel and therefore hard to evaluate. We provide suggestions for the design of distributed decision‐making systems. [ABSTRACT FROM AUTHOR]

Background: Homophily is the tendency to associate with friends similar to ourselves. This study explored the effects of homophily on team formation in a physical activity challenge in which "captains" signed up their Facebook friends to form teams. Methods: This study assessed whether participants (n = 430) were more similar to their teammates than to nonteammates with regard to age, sex, education level, body mass index, self-reported and objectively measured physical activity, and negative emotional states; and whether captains were more similar to their own teammates than to nonteammates. Variability indices were calculated for each team, and a hypothetical variability index, representing that which would result from randomly assembled teams, was also calculated. Results: Within-team variability was less than that for random teams for all outcomes except education level and depression, with differences (SDs) ranging from +0.15 (self-reported physical activity) to +0.47 (age) (P < .001 to P = .001). Captains were similar to their teammates except in regard to age, with captains being 2.6 years younger (P = .003). Conclusions: Results support hypotheses that self-selected teams are likely to contain individuals with similar characteristics, highlighting potential to leverage team-based health interventions to target specific populations by instructing individuals with risk characteristics to form teams to help change behavior. [ABSTRACT FROM AUTHOR]

Homophily—individuals' affinity for others like them—is a powerful principle that governs whose opinions people attend to. Using nearly 2,400 advisory meetings, we find that homophily has a significant positive impact on the likelihood of following financial advice. The increased likelihood of following stems from homophily on gender and age for male clients and from sameness on marital and parental status for female advisees. Moreover, the homophily effect is mitigated by reduced information asymmetry between client and advisor and a long-term relationship with the bank. Our results suggest that client-advisor matching increases individuals' propensity to follow financial advice. Received June 21, 2017; editorial decision June 7, 2018 by Editor Philip Strahan. [ABSTRACT FROM AUTHOR]

The interorganizational relationship communication literature has identified homophily – the tendency for actors to form ties with similar others – as a mechanism predictive of tie formation among organizations in civil society networks. This study examined the connection between homophily and network structures equated with different types of social capital and perceptions of influence. Using survey data gathered from a network of Malaysian civil society organizations (n = 90), exponential random graph models and autologistic actor attribute models were used to test the association between homophily characteristics and the networked social capital positions of bridging, bonding, and gatekeeping. Results showed that bonders and brokers tended to be influenced by homophily, whereas gatekeepers were influenced by heterophily and homophily. Homophily was also associated with the likelihood of CSOs rating each other as more influential on government reform. [ABSTRACT FROM AUTHOR]

Policy scholars have increasingly focused on collaborative and competitive relationships between stakeholder coalitions. The Advocacy Coalition Framework (ACF) in particular has directed scholarly attention toward such relationships. The ACF defines advocacy coalitions as groups of actors who share beliefs and coordinate their action. However, previous research has been inconsistent in defining and measuring coalitions, which has hampered comparative research and theory building. We present a method called the Advocacy Coalition Index, which measures belief similarity and the coordination of action in a manner that makes it possible to assess the extent to which advocacy coalitions are found in policy subsystems, whether subgroups resemble coalitions, and how individual actors contribute to coalition formation. The index provides a standardized method for identifying coalitions that can be applied to comparative research. To illustrate the effectiveness of the index, we analyze two climate change policy subsystems, namely Finland and Sweden, which have been shown to differ in terms of the association of belief similarity with coordination. We demonstrate that the index performs well in identifying the different types of subsystems, coalitions, and actors that contribute the most to coalition formation, as well as those involved in cross‐coalition brokerage. [ABSTRACT FROM AUTHOR]

This article investigates different polarizing mechanisms--relational homophily and ideological partisanship--characterizing political communications using Twitter data collected during the 2017 Norwegian election. By combining two computational approches--partition-specific network analysis and quantitative analysis of language polarization--we can examine the linkages between the structure of interactions and political polarization. The results show that the Norwegian political Twittersphere is not made of isolated echo chambers but is structured around crosscutting communities of interaction. There are no signs that communities with higher degrees of polarization are the ones that display higher degrees of homophily. Yet, the degree of ideological polarization differs across communities and topics. Some topics, such as political hate and far right and economy and taxes, are more polarized than others. [ABSTRACT FROM AUTHOR]

In this study, a novel top-K ranking recommendation method called collaborative social metric learning (CSML) is proposed, which implements a trust network that provides both user-item and user-user interactions in simple structure. Most existing recommender systems adopting trust networks focus on item ratings, but this does not always guarantee optimal top-K ranking prediction. Conventional direct ranking systems in trust networks are based on sub-optimal correlation approaches that do not consider item-item relations. The proposed CSML algorithm utilizes the metric learning method to directly predict the top-K items in a trust network. A new triplet loss is further proposed, called socio-centric loss, which represents user-user interactions to fully exploit the information contained in a trust network, as an addition to the two commonly used triplet losses in metric learning for recommender systems, which consider user-item and item-item relations. Experimental results demonstrate that the proposed CSML outperformed existing recommender systems for real-world trust network data. [ABSTRACT FROM AUTHOR]

Recidivism rates are a growing concern due to the high cost of imprisonment and the high rate of ex-prisoners returning back to prison. One policy-relevant and potentially important determinant of recidivism is the composition of peer inmates. In this paper, we study the role of peer effects within a correctional facility using data on almost 80,000 individuals serving time in Georgia. We exploit randomness in peer-composition over time within prisons to identify effects of peers on recidivism rates. We find no evidence of peer effects for property or drug-related crimes in the general prison population. However, we find strong peer effects when we define peer groups by race and age. Our findings indicate that homophily plays a large part in determining the strength of peer exposure among prisoners in the same facility. These results suggest that prison assignments can be used to reduce recidivism for particular groups of prisoners. (JEL K14, K40). [ABSTRACT FROM AUTHOR]

Virtual learning environments have been recognized as an area of particular importance by which educators can use to improve desirable learning behaviours. Investigating the impact of different virtual environments on learners' behaviours has become the centre of attention of researchers, especially during COVID-19. The homophily effect of avatar-identity on individuals' perceptions of an environment can be a key for understanding their learning behaviours. This study examined the relationship between key constructs related to avatar homophily (background and attitude) and learners' flow and exploratory behaviour. An online survey was distributed to 157 students (93 males and 64 females with age ranging from 19 to 21 years) who took part in an online learning activity using an avatar-mediated environment (Second Life). The results showed that users' flow experience can be influenced by the function of perceived background and attitude homophily in an avatar-mediated environment. Flow experience was found to mediate the relationship between avatar homophily and learners' exploratory behaviour. This study offers a conceptual understanding of the relationship between homophily and individual's flow state. [ABSTRACT FROM AUTHOR]

Prior literature on political filter bubbles suggests an overall positive association between social media use and political networks diversification. Sometimes, this might not be the case. This study argues that the News Finds Me perception (NFM) or the belief that "one" can be well-informed about public affairs without actively seeking information as news will find "me" through "my" networks, tend to nurture a positive attitude toward algorithmic news gatekeeping. Likewise, NFM's news over-reliance on one's social network support the development of homogeneous information and discussion political networks in social media (political homophily). Results based on a variety of ordinary least squares regression models (cross-sectional, lagged, and autoregressive) from a U.S. representative panel survey, as we all as autoregressive structural equation model tests, indicate that this is indeed the case. This study serves to specifically clarify when and how social media and the NFM facilitate politically homogeneous filter bubbles. [ABSTRACT FROM AUTHOR]

While we know that adolescents tend to befriend peers who share their race and gender, it is unclear whether patterns of homophily vary according to the strength, intimacy, or connectedness of these relationships. By applying valued exponential random graph models to a sample of 153 adolescent friendship networks, I test whether tendencies towards same-race and same-gender friendships differ for strong versus weak relational ties. In nondiverse, primarily white networks, weak ties are more likely to connect same-race peers, while racial homophily is not associated with the formation of stronger friendships. As racial diversity increases, however, strong ties become more likely to connect same-race peers, while weaker bonds are less apt to be defined by racial homophily. Gender homophily defines the patterns of all friendship ties, but these tendencies are more pronounced for weaker connections. My results highlight the empirical value of considering tie strength when examining social processes in adolescent networks. [ABSTRACT FROM AUTHOR]

Research suggests that organizations tend to collaborate with others that share similar ascribed status, but focuses less on the role of value homophily. To advance a fuller understanding of how organizations select partners, this study examines the roles of—and relationship between—status and value homophily in interorganizational collaboration (IOC). Specifically, it examines the influence of value homophily (i.e., similar service, staff, and organizational identity) on three forms of status homophily (attribute-based, geography-based, and institutional) in nonprofit collaborative aspirations. Survey data from 141 U.S. faith-based organizations (FBOs) revealed the differential impact of organizational and service religiosity on FBOs' collaboration preferences. Specifically, findings suggest that organizational religiosity makes FBOs more restrictive, but service religiosity makes FBOs less restrictive in ideal partner selection. The results suggest theoretical contributions to communication research on IOC and social networks, as well as implications for navigating multifaceted organizational identities and cross-sector partnerships. [ABSTRACT FROM AUTHOR]

Geographic proximity has become increasingly relevant due to the growing number of marketing services that use consumers’ geographic locations, thus increasing the importance of gaining insights from this information. In five studies (both field and experimental), the authors analyze the effect of geographic proximity on social influence and demonstrate that not only social proximity but also perceived homophily can trigger social influence. They find that this effect holds under alternative representations of geographic distance and is confirmed for a range of different services and even for physical goods. Furthermore, the authors show that geographic proximity has a relative effect because the social influence of a closer sender is stronger than that of a more distant sender, regardless of the absolute distances. They present managerially relevant conditions under which the influence of geographic proximity not only is comparable to other types of information such as age or gender but also provides sufficient informational value for customers to offset differences among alternatives (e.g., due to higher prices) in trade-off decisions. [ABSTRACT FROM AUTHOR]

Drawing on a large database of publicly announced R&D alliances, we empirically investigate the evolution of R&D networks and the process of alliance formation in several manufacturing sectors over a 24-year period (1986-2009). Our goal is to empirically evaluate the temporal and sectoral robustness of a large set of network indicators, thus providing a more complete description of R&D networks with respect to the existing literature. We find that most network properties are not only invariant across sectors, but also independent of the scale of aggregation at which they are observed, and we highlight the presence of core-periphery architectures in explaining some properties emphasized in previous empirical studies (e.g. asymmetric degree distributions and small worlds). In addition, we show that many properties of R&D networks are characterized by a rise-and-fall dynamics with a peak in the mid-nineties. We find that such dynamics is driven by mechanisms of accumulative advantage, structural homophily, and multiconnectivity. In particular, the change from the "rise" to the "fall" phase is associated to a structural break in the importance of multiconnectivity. [ABSTRACT FROM AUTHOR]

This study investigates how the attributes of online social platforms (e.g., open vs. closed, symmetric vs. asymmetric social networks) and user preferences regarding platform diversity (e.g., single-homing vs. multi-homing) moderate the influence of homophily on user behaviors across varied social segments. On the basis of panel data, we delve into the interplay among homophily, structural diversities across various online social networking services (SNSs), and users’ homing preferences in such social platforms. The data feature of the SNS consumption behaviors of 10,172 individual users are obtained over a period of 134 days. An agent-based simulation model is developed to further validate and generalize the empirical findings. The simulation and empirical results consistently indicate that propensity toward homophily differs significantly across platform types and users’ channel adoption behaviors. Online homophily is more pronounced in closed, private social networks than in open, public social networks. Users of asymmetric and symmetric SNSs exhibit weak and strong homophily, respectively. Moreover, whereas users who adopt a single SNS channel tend toward homophily, those who subscribe to multiple SNSs confirm the idea that “opposites attract.” These findings suggest that users of online SNS channels manifest complex human interactions typified by the combination of homophily, heterophily, and asymmetric social preference, although homophily is the most prominent disposition. Our findings suggest that homophily should be considered a dynamically changing human characteristic rather than a static attribute, and stakeholders should exploit the complex nature of users’ homophilous behaviors to address social problems in online SNSs and to enhance the effectiveness of social advertising. [ABSTRACT FROM PUBLISHER]

In this paper, we examine when members of underrepresented groups choose to support each other, using the context of the funding of female founders via donation-based crowdfunding. Building on theories of choice homophily, we develop the concept of activist choice homophily, in which the basis of attraction between two individuals is not merely similarity between them, but rather perceptions of shared structural barriers stemming from a common social identity based on group membership. We differentiate activist choice homophily from homophily based on the similarity between individuals ("interpersonal choice homophily"), as well as from "induced homophily," which reflects the likelihood that those in a particular social category will affiliate and form networks. Using lab experiments and field data, we show that activist choice homophily provides an explanation for why women are more likely to succeed at crowdfunding than men and why women are most successful in industries in which they are least represented. [ABSTRACT FROM AUTHOR]

With the growing call for private sector actors to address global challenges, it is necessary to first assess whether regions with the greatest needs are accessing corporate philanthropy. In this paper, we ask whether corporate philanthropy is reaching those with the greatest health-care needs. Drawing on economic geography and corporate homophily, we argue that corporate philanthropy tends to exacerbate health inequality as grants are destined for counties with fewer health problems. We test and find support for this hypothesis using data on health grants made by US corporate foundations and county-level health data. Our results that corporate health grants are less likely to go to counties which have a lower proportion of medical service providers and insured citizens suggest that corporate foundations are unwittingly complicit in worsening the resource gap between small, poor, rural counties and large, wealthy, urban counties. From an ethical perspective, we provide some guidance as to how this may be corrected. [ABSTRACT FROM AUTHOR]

In the United States, Asians appear disproportionately underrepresented in leadership roles, a puzzling phenomenon known as the "Bamboo Ceiling" (Hyun, 2005; Lu et al., 2020). We advance a social network explanation for this phenomenon: ethnic homophily. We theorize that East Asians (e.g., ethnic Chinese)—but not South Asians (e.g., ethnic Indians)—are less likely than other ethnicities to emerge as leaders in multiethnic environments partly because East Asians socialize more with ethnic ingroup members (other East Asians). Analyzing a survey of 54,620 Juris Doctor (JD) students from 124 U.S. law schools, Study 1 revealed that East Asians had the highest ethnic homophily of all ethnicities. Studies 2 and 3 examined friendship networks and leadership emergence in 11 class sections of new Master of Business Administration (MBA) students in a U.S. business school, and found that East Asians were the least likely to be nominated and elected as leaders. Social network analysis revealed that, compared to South Asians, Latinos, and Whites, East Asians exhibited higher ethnic homophily, which mediated their lower leadership emergence. These effects occurred for both East Asian internationals and East Asian Americans, and were robust after accounting for variables such as assertiveness (parallel mediator), network centrality, English proficiency, demographics, and personality. By integrating social network analysis into psychology, we identify ethnic homophily as one reason why the Bamboo Ceiling exists for East Asians but not South Asians. Moreover, by uncovering the negative link between ethnic homophily and leadership emergence, our research suggests that bonding with people from different ethnic backgrounds can facilitate individuals' leadership emergence in multiethnic environments. [ABSTRACT FROM AUTHOR]

Research on political homophily has almost exclusively focused on adults, and little is known about whether political homophily is present early in life when political attitudes are forming and friendship networks are rapidly changing. We examined political homophily using a social network approach with rural middle school students (N = 213; mean age = 12.5 years; 57% female) from a remote U.S. community. Preregistered analyses indicated that early adolescents were more likely to spend time with people who shared similar political attitudes and values. These effects were most consistent for right-wing authoritarianism, patriotism, and anti-immigration attitudes. Our results show that political homophily is evident at an early age when young people are forming their political beliefs and making decisions about their friendships, suggesting that peer political-attitude socialization may emerge early in life. [ABSTRACT FROM AUTHOR]

The divergence of Eastern and Western civilizations is conventionally explained by a combination of historical, economical, and geographical factors. Here I explored the contribution of DRD2 and CYP2A6 gene variations, that were shown to contribute to homophily and heterophily in friendship in social networks and differ in their frequencies in East Asia and European ancestry populations. Modeling suggests that allelic frequencies, profoundly affect the abundance of predicted social connections in the two populations: in the European ancestry populations, the total number of predicted connections was almost twofold higher than that of the East Asian population. A plausible hypothesis is that abundant connections between individuals, likely supersede the coherence of hierarchical structures in societies, promoting individualism. In East Asia, the reduced prevalence of DRD2-associated connections favors a more collectivistic society at which the hierarchy is not compromised by the complex interpersonal relationships among individuals. These trends were reenforced by the observation that in the European populations only, the predicted social connections derived by the actual DRD2 genotypes were elevated compared to those calculated by the corresponding frequencies of the DRD2 alleles. The presence of the heterophily-linked CYP2A6 variations in the EUR population may also contribute to this as it may operate as a "social disruptor" gene, conferring to the establishment of relatively isolated clusters, increasing the overall complexity of the resulting social network. These approaches may provide paradigms contributing to our understanding of cultural divergence between populations. [ABSTRACT FROM AUTHOR]

Prior research on the impact of mandatory quotas in one dimension of diversity, on other dimensions, shows contradictory results. We seek to resolve this puzzle by relying on theory in social psychology on homophily and recategorization processes in hiring. In the context of a law mandating a gender quota on Indian boards, we predict and find that boards respond to the law by hiring new women directors who are similar to existing directors in terms of caste and community dimensions. We find that this homophily effect is impactful to the extent that even high-status women directors cannot overcome it. At the aggregate level, these organizational-level practices result in caste and community inequalities remaining intact despite the introduction of 1309 new women directors. We contribute to research on inequality, board of directors, and affirmative action. [ABSTRACT FROM AUTHOR]

People form relationships with people from their own racial groups, a phenomenon called racial homophily, which reduces interracial contact and exacerbates inequality and prejudice. Although viewed as arising from environmental factors, we argue that racial homophily also involves individual choice and, thus, personality factors. We address three major issues. First, are interpersonal concerns (Agreeableness) and intergroup concerns (Openness) differentially relevant to cross-race friendships? Second, are current conceptions of Openness sufficient, or do we need lower-level facets more attuned to intergroup concerns? Third, can we specify the interplay between personality and contextual factors in different settings? Across four studies (total N = 1,820), Agreeableness failed to predict more cross-race friendships, in both self- and peer reports, suggesting that interpersonal kindness was not sufficient to overcome racial homophily. In contrast, Openness and Openness to Other (O2, a new social facet of Openness) consistently predicted cross-race friendship. However, the O2 facet had the stronger and only unique effect, suggesting it is the "active ingredient." High-O2 individuals had an almost equal 1:1 ratio of same-to-different-race network members, whereas low-O2 individuals had 4:1 same-race. These results held for both college students and middle-aged adults, both friends and new acquaintances in the network, and both networks established before and at a diverse university. Finally, when moving to a more diverse environment, high-O2 individuals seemed to take advantage of the new environmental affordances, adding more different-race members to their networks. Overall, these studies advance understanding of person–environment transactions, showing how personality traits matter to the structure of people's social networks. [ABSTRACT FROM AUTHOR]

Research issue: A consistent feature of social networks is homophily: the tendency for people to interact with similar others. Psychological and sociological research suggests that homophily is most pronounced along ideological lines, with conflicting evidence as to whether this tendency is higher among individuals who hold liberal or conservative beliefs. Based on this literature, we conduct the first study of ideological homophily in two key organizational networks: the intrafirm connections among directors on the board and the interfirm connections created by board interlocks. Research insights: In a panel of 408 U.S. firms between 2000 and 2020, we find that liberalism increases homophily both within and between boards. Furthermore, we find that homophily has decreased over time but that this has been driven by conservative boards while the effect of liberalism has strengthened in recent years. These findings provide the first evidence for an ideological component in the composition of intra‐ and interorganizational networks. Academic implications: Most research on director selection and interlock formation has focused on situational or demographic antecedents. Our findings contribute to the development of a broader theoretical framework that accounts for individual dispositional factors in these processes. Practitioner implications: Our findings bring attention to the issue of ideological homogeneity in firms. Given the growth of homophilic tendencies among liberal directors in recent years, we suggest that it may be increasingly important for directors to become aware, and mitigate the effects, of their ideological biases in order to maintain cognitive diversity in information networks and decision making. [ABSTRACT FROM AUTHOR]

While communication research on interorganizational homophily has grown, little is known about how issue homophily—defined here as the propensity to form ties based on shared issue priorities—influences interorganizational relationships in civil society. Our theoretical framework brings together homophily research and issue niche theory to explore the potential influence issues have on interorganizational network tie formation. Our empirical case is the network of civil society organizations focused on government reform in Malaysia. Using data gathered from a survey with organizational leaders (n = 90), exponential random graph models with binary and valued data explored how two types of homophily are associated with tie formation and cooperation in interorganizational relationships. Key findings from the study include that more important issues appear to drive tie formation and levels of cooperation in the network, only specific issues lead to homophilous ties, and issue homophily does not lead to greater levels of cooperation among civil society organizations. [ABSTRACT FROM AUTHOR]

In this article we argue that social networks produced in recreational spaces in the workplace are key to workers' employment trajectories. Drawing from a Chilean case study, we argue that employer‐organised workplace entertainment activities, which we call formal events, provide a unique opportunity for workers to establish bonds and contacts that challenge tendencies towards homophily (social similarity) in ways that are particularly helpful to groups marginalised by gender and social class. We also show how employee‐organised events, on the contrary, which we call informal events, solidify homophily, shoring up pre‐existing group solidarities and privileges, negatively affecting conditions of employment and the upward mobility of workers with limited existing social capital and networks. [ABSTRACT FROM AUTHOR]

This opinion piece focuses on the nature of male homophily and bias in academic research, publishing and practice, and how homophilic practices in writing, reviewing and publishing academic research disproportionately advantage the academic work and voices of male academics while disenfranchising those of women within 'the academy' and academic institutions. After first briefly considering the nature of male homophily and relevant historical dimensions, attention then turns to the practices that prevail today including the stark realities presented by recent research. Pragmatic responses to tackling male homophily and bias in academic work, cultures and practices are then considered, in areas including the work of journals and their editorial boards, research leadership and supervision, academic leadership and in learning and teaching. [ABSTRACT FROM AUTHOR]

We study the effect of peer influence on products that exhibit positive network externalities to nonadopters, i.e., products that benefit adopters' friends even if they do not adopt. In contrast to products that exhibit positive network externalities upon adoption, this structure of incentives likely results in negative peer influence: the more friends that adopt the product, the smaller the incentive to adopt. We measure this effect empirically by using observational data from a large mobile carrier serving 5.7 million users. We estimate the effect of peer influence across five different products of this type. A naive approach to do this results in a positive estimate for peer influence due to unobserved homophily. We follow two approaches to address this issue. First, we suggest using the number of friends that end up adopting a product as a proxy for unobserved user-fixed effects. Second, we control for homophily by applying a shuffle test, i.e., we compare the effect of peer influence from the original data with the effect obtained from comparable randomly generated data without peer influence. We obtain negative estimates from both approaches, which adds robustness to our findings. Finally, we show that even for these products, the effect of peer influence associated with the first friends that adopt the product is positive because they still convey useful information that reduces uncertainty. The negative effect of peer influence arises only for subsequent friends that adopt the product. While these friends are unlikely to convey new information about the product, they decrease the economic incentive to adopt, resulting in a negative aggregate effect of peer influence. [ABSTRACT FROM AUTHOR]

This paper deals with how to recognise if the patterns of homophily found in a social network are resilient to small disturbances that may occur in that network. Data from a survey of students in a secondary school in the Canary Islands were replicated using an agent-based model. The model calculated homophily indices and their statistical significance and then simulated small alterations in the distribution of links. The results clearly show that some homophily indices resist these kinds of perturbations and others do not. Evidence suggests that the distribution of individuals across the social network communities is a key factor in explaining why certain patterns of relationships are more resilient than others. [ABSTRACT FROM AUTHOR]

As communication increasingly occurs in online environments, it is important to know the structure of such conversations in social networks. Here, we investigate patterns of conversation in online forums concerning politics, as well as patterns of cross-ideological interactions in forums that are not expressly political. First, we demonstrate a method for measuring the latent ideological preferences of more than 690,000 individuals using patterns of political commenting. Using this measure, we find that communication between ideologically dissimilar individuals becomes more common in periods of increased engagement with politics, that political homophily decreases as more individuals contribute to a conversation, and that forums dedicated to nonpolitical topics exhibit substantially less homophily than political forums. Theoretical implications for political communication on online platforms are discussed. [ABSTRACT FROM AUTHOR]

Background: The concept of archetypes is often deployed to understand people engaged with far-right or right-wing online content. However, this can lead to essentializing assumptions that overlook how users are mobilized to participate with these politics. Analysis: This article theorizes how users are mobilized to perform far-right politics by conceptualizing them as embodying homophilic avatars, treating online practice as performative and homophily as an online and offline force. Conclusion and implications: Through qualitative analysis on Facebook, the homophilic avatar shows how users are driven to engage with far-right or right-wing content via political performativity and homophily, as opposed to psychological tendencies. [ABSTRACT FROM AUTHOR]

This article studies the strategic network formation in a location-based social network. We build an empirical model of social link creation that incorporates individual characteristics and pairwise user similarities. Specifically, we define four user proximity measures from biography, geography, mobility, and short messages. To construct proximity from unstructured text information, we build topic models using Latent Dirichlet Allocation. Using Gowalla data with 385,306 users, 3 million locations, and 35 million check-in records, we empirically estimate the model to find evidence on the homophily effect on network formation. To cope with possible endogeneity issues, we use exogenous weather shocks as our instrumental variables and find the empirical results are robust: network formation decisions are significantly affected by our proximity measures. [ABSTRACT FROM PUBLISHER]