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It has been over 20 years since the landmark publication of Mizruchi (1996) and his examination of “what do interlocks do?”. Since then, the nature of interlocks and subsequent research on the subject has evolved. This paper aims to revisit the literature on interlocking directorates through a quantitative bibliometric analysis.

This study undertakes a bibliometric analysis of literature citing the Mizruchi (1996) to examine the state of research following up on “what do interlocks do”. This study examines 718 publications using keyword and co-word analysis, along with a thematic analysis to revisit the research that has followed Mizruchi’s topic of what do interlocks do.

This study finds that the topics of the corporate elite, capitalist economy and corporate governance have remained prominent themes in the field. Research areas that are emerging in the field of interlocking directorates include gender diversity, globalisation and advancing theoretical frameworks.

This paper provides a quantitative bibliometric analysis to revisit the extant literature on “what do interlocks do”, examining a high number of articles to identify areas which could be developed to advance research in the field.

Over the last 100 years, research on interlocking directorates has proliferated. The purpose of this paper is to realize a bibliometric analysis of articles on interlocking directorates to identify the evolutionary patterns that characterize the studies on board interlocks.

A bibliometric analysis of articles on interlocking directorates published since 1914 was realized to evidence how research has evolved over time. Papers were classified according to the research topic, the type of article and the use of different theories to explain board interlocks’ causes and effects.

The authors identified four different periods that characterize board interlocks studies: the emerging debate, the earliest modern era, the modern era and the post-modern era.

This bibliometric analysis assesses the extant literature by highlighting emerging trends and identifying several avenues for future research.

This study analyses interlocking directorates from the perspective of an emerging market, Mexico, where formal institutions are weak, and family firms with high ownership concentration dominate. It responds to recent calls in the literature on interlocks, which urge the differentiation between family and non-family businesses and to complete more research on emerging economies.

A database was constructed for 89 non-financial companies (52 family-owned) listed on the Mexican Stock Exchange (BMV) from 2001 to 2014. This period includes normal times and an episode of financial crisis (2009–2010). To test the hypotheses, a dynamic panel model (in two stages) is used, applying GMM.

In normal times, the advantages of Board Chairman (COB) interlocks for the performance of publicly traded Mexican family firms are obtained regardless of the weak formal institutional environment. By contrast, during financial crisis, interlocking family COBs are more likely to jointly expropriate minority shareholders with actions that further their family objectives, which mitigates the positive effect of interlocks on performance. These findings contrast with the insignificant effects of COB interlocks found for non-family corporates.

A new framework is proposed which, through agency theory, finds points of concordance among resource dependence and class hegemony theories, to understand the effect of interlocking directorates on the performance of family firms operating in Mexico. The results of the empirical exercise for family companies listed on BMV during normal and financial crisis periods suggest its applicability.

This paper explores the relationship between board interlocks and firm outcomes by reviewing the most recent peer-reviewed articles examining this research theme.

A systematic and bibliometric methodology of assessing 369 peer-reviewed articles from the Web of Science (WoS) database was applied. The study also leverages key R-packages litsearchr and Bibliometrix software to enhance the descriptive and thematic literature analysis to identify gaps and opportunities for new research.

This study confirms a rapid increase in articles on this thematic area, over the last decade, with increasing collaboration occurring among researchers in the United States, Europe, China, South Korea and India. Four core research clusters are identified. The first and largest cluster links interlocked directors to issues related to corporate governance and firm outcomes. The second cluster links social network theory, interlocking directorates and firm outcomes. Smaller emerging research clusters include topics related to ownership structure, board size, political connectedness and impacts on firm outcomes. The final cluster examines the influence of board interlocks on market value and firm innovation.

Interlocked directors can have both positive and negative impacts on a wide variety of firm outcomes. This study places great interest in the selection of new directors, ensuring that the selection has aligned with the needs and interests of the company and disclosures of potential competing interests are declared and considered. Equally important are the governance practices used to monitor directors' behavior and to protect the interest of shareholders and the firm. This is particularly relevant in the internal appointment of interlocked directors to critical positions, such as audit committees or instances where interlocked directors may simultaneously hold CEO or executive leadership positions in other companies.

This paper examines the board interlocks literature related to firm outcomes. Additionally, this review identifies several topics and disciplines which, if pursued, could enrich the literature and promise new avenues for future research.

This chapter examines interlocks among the governing boards of 12 leading policy-planning organizations and changes in the structure of this network between 1973 and 2000. Methods of multidimensional scaling and hierarchical clustering are used to construct topographical maps of the pattern of interlocks among policy-planning groups and their change over time. In contrast to the findings on corporate interlocking directorates, the study shows that board interlocks among policy-planning organizations are substantively meaningful and relatively stable at the dyadic level, although several changes in the topology of the network are also found. In all three decades, big-business “moderate-conservatives” like the Business Council and the Business Roundtable occupied the most central locations in the network. In the 1970s these organizations were linked with the “corporate liberals” to form the core cluster of the policy network. In the 1980s and 1990s the corporate liberals became relatively isolated from the core and their places were taken by several conservative groups. There was also a sharp rise in the cohesion of the network in the late 1970s and 1980s – a period that is widely seen as one of conservative political mobilization and heightened political unity among business elites. These changes in the structure of the policy network are consistent with and help to account for the rightward shift in U.S. state policy during this period.

The relationship between interlocking directorates and firm performance has been increasingly debated, with a focus on whether firm's centrality in interlock networks is associated with performance. The purpose of this study is to examine not only how a firm's position in this network is associated with performance but also how the performance of network partners can impact a firm's performance. This study examines how firms effectively utilise the interlock network to achieve the goal of higher market capitalisation – termed market capitalisation rank (MCR).

The premise of the study is the UK FTSE 350 firms from 2014 to 2018. The paper makes use of a temporal network autocorrelation model to examine how firm characteristics, the structural position in the interlock network and the performance of network partners affect MCR over time.

The analysis indicates that firms with ties (via the interlock network) to firms with high market capitalisation are more likely to enhance their own MCR, highlighting network partners have the opportunity to play a critical role in a firm's dominance strategy to optimise firm value.

The value of this research is that it does not only look at the impact of a firm's position in the network on performance, but the impact of the performance of network partners on a firm's market performance as well.

This paper aims to explore the effect of interlocking directorates on agency conflicts and corporate performance in the shipping industry.

The authors use social network analysis to discover central nodes in the network of personal and corporate connections in an international sample of 110 listed shipping companies.

Assessing network structure, the authors find that the network of corporate leaders is denser than the network of shipping companies. The network of shipping companies is populated with many isolated nodes; the network of shipping executives and directors is populated with many cohesive groups in which the longest distance between two corporate leaders is two companies. The authors find that interlocking corporate leadership can help resolve agency conflicts in the shipping industry, bearing a negative effect on the magnitude of agency costs. The extent of leadership overlaps is associated with board size, financial leverage and profitability. The relationship between profits and interlocks is bidirectional, implying that interlocking directorates bear a positive effect on asset returns.

The authors map the relational structures in the social networks of companies and company leaders in the shipping industry and discover the cross-sectional determinants of interlocks in the shipping industry. The finding about the effect of interlocks on profitability and agency costs bears policy implications for the design of corporate governance in the shipping industry.

The purpose of this study is to explore the impact that women who sit on boards of directors, as well as women that are part of an interlocking directorate, have on corporate performance. The investigation is placed within the literature on human capital theory and resource dependency as an argument for gender diversity and boards of directors.

A director data set for over 32,000 firms based in the USA, composed of 6,218 women and 54,932 men, is utilized. From this, regression and network analysis were utilized.

It is found that female directors’ participation in interlocking directorates translates into greater corporate performance when compared to simply examining female representation on boards of directors. Additionally, women involved in interlocks translated into greater corporate performance when compared to men. These results support the resource dependency approach.

Results of this study suggest that when considering female directors, corporate performance is enhanced when female directors already sit on the boards of other firms.

This study highlights external network connections to differentiate between human capital theory and resource dependency as an argument for gender diversity and boards of directors.

Based on resource dependence theory and the concept of interlocking directorates, the purpose of this paper is to understand the importance of networks for start-ups and the role incubators play in these companies’ networking processes.

The research was conducted through semi-structured interviews with the entrepreneurs responsible for three start-ups and the heads of their incubators. The interview data were subjected to content analysis using NVivo software.

The results indicate that start-ups often resort to networks to overcome their weak reputations and scarce resources. Incubators play a quite important role in this process since they promote events that encourage the creation of partnerships and networks either between start-ups within the same incubator or with external institutions. In addition, the results reveal that most cooperation networks are informal and that they fulfil needs that start-ups are not yet able to meet themselves, for example, when they compete for public tenders.

The present study explored this topic from two perspectives (i.e. start-ups and incubators). This approach facilitated the identification of the main features upon which start-ups depend, the entities to which these companies turn for help, the kind of communication in which they usually engage, the primary advantages of establishing cooperation networks and the main types of support given by incubators.

Most studies of cooperation networks are based on transaction cost economics, a resource-based perspective and/or institutional theory. In contrast, this study innovated by applying resource dependence theory and the concept of interlocking directorates, which provided an alternative explanation regarding cooperation networks’ importance to start-ups and incubators’ roles in these companies’ networking processes.

One of the most active areas of study in the field of corporate governance, board interlocks is a phenomenon that is both pervasive and perplexing. This paper aims to examine and integrate the empirical research on board interlocks to fill the void left by the lack of a recent review.

The bibliometric analysis methodology, which emphasizes methodological rigor and transparency, was used to analyze the board interlocks literature. Eighty publications published since 2000 were chosen as the subject of this research because they reveal the key contributions to the field of board interlocks. Additionally, their clustering pattern is also identified.

The authors classify various studies conducted on board interlocks into three clusters: “Social Capitalization”, “Antecedents and Outcomes” and “Corporate Governance”.

This literature review helps better comprehend the board interlocks literature by pointing out several areas of study that, if pursued, would add to the existing body of knowledge and open future research directions.