Modern financial systems exhibit a high degree of interdependence, with connections between financial institutions stemming from both the asset and the liability sides of their balance sheets. Networks--broadly understood as a collection of nodes and links between nodes--can be a useful representation of financial systems. By modeling economic interactions, network analysis can better explain certain economic phenomena. In this chapter, Allen and Babus argue that the use of network theories can enrich our understanding of financial systems. They explore several critical issues. First, they address the issue of systemic risk, by studying two questions: how resilient financial networks are to contagion, and how financial institutions form connections when exposed to the risk of contagion. Second, they consider how network theory can be used to explain freezes in the interbank market. Third, they examine how social networks can improve investment decisions and corporate governance, based on recent empirical results. Fourth, they examine the role of networks in distributing primary issues of securities. Finally, they consider the role of networks as a form of mutual monitoring, as in microfinance.

Global networks of firms are rapidly replacing top-down, hierarchical organizations. Such networks, thanks to information technology and global communications systems, can respond to changes in international demand faster and more flexibly than rigid corporate organizations of the past. But by drawing together diverse cultures and individuals, these networks present new challenges to leaders. Traditional styles of leadership are not enough for this emerging environment. The kind of leadership style that leads to efficient execution in these global networks is different from the “do it and do it now” approach that might work in hierarchical organizations. Based on the author’s experience in the leading global accounting firm Touche Ross, serving as dean of the Wharton School, and heading his own corporate investment firm, this chapter discusses leadership in a networked, global environment.

Although any manager would recognize the importance of “networking” in finding, developing, and retaining employees, human resource management traditionally has focused on individuals. In this chapter, the authors point out that core HR processes such as recruitment and hiring, training and development, performance management, and retention all depend on networks. They consider the importance of weak ties in matching employees with jobs and “structural holes” in promoting creativity. They urge managers to make the shift from an atomized view to a network view of human resources--from focusing on the “trees” to understanding the “forest.” They show that networks can boost efficiency and productivity by facilitating information sharing, attracting talent, and strengthening employees’ commitment to the firm. But networks may also pose risks such as “lift-outs,” in which a departing employee takes other workers in his or her network. The authors explore how managers need to understand the impact of networks and how to “manage” them.

The instant messaging generation, wired and integrated into broad, flat networks almost from birth, will not function as their predecessors did when injected into the social networks that form their professional organizations. IM’ers are creating their own network styles and content, as well as their own informal, back-channel networks, different from those of their more senior coworkers, and more compatible with their personal styles and loyalties. If their adoption of workplace communications norms indeed differs from that of their predecessors, how will these individuals function differently as employees, and how will organizations need to adapt their training, their managerial styles, and their expectations of employees’ motivations, performance, and loyalty to incorporate these new employees? After reviewing the literature on social networks, the authors explore a few prominent and visible trends that affect employers and employees: (1) changing communications technologies and their implication for social organization; (2) changing perception of fact, technique, and reality, and implications for authority and decision styles; and (3) outsourcing, downsizing, and the erosion of organizational loyalty. They then offer qualitative impressions, as well as insights from an online survey (of 80 respondents), and explore implications for managers and organizations.

The locus of innovation is shifting from the firm to the network. In contrast to developing standalone products, innovators are drawing together networks that deliver a personalized, co-created experience to the customer. This chapter describes a model in which nodal firms link communities of customers with communities of prequalified vendors. It examines cases from cardiac pacemakers to addressing diabetes and explores the implications of this shift for product and service innovation, value creation, and new sources of competitive advantage.

Managers often must make decisions that depend on decisions in other parts of the organization. These interactions create a network of interdependent choices and make strategizing difficult. In this chapter, the authors explore the intersection between organizing and strategizing. Motivated by real examples that run contrary to conventional wisdom, the authors examine how firms organize themselves to strategize well. In particular, they examine “premature lock-in”--how a firm’s strategizing efforts can become stuck in a web of conflicting constraints prematurely, before managers have explored a wide enough range of possibilities. A key role of organizing is to free strategizing efforts and encourage broad search. At the same time, organizing must ensure that strategizing efforts stabilize after the firm discovers an effective set of choices. Balancing search and stability, the authors argue, is a central challenge of organizing. They explore this challenge with an agent-based simulation that shows (1) how a change in organizational structure[md]for example, a shift from decentralization to integration[md]may reflect not a reversal of early mistakes but an effective sequence of organizing; and (2) why firms may benefit from unnecessary overlap between departments. They conclude that a period of decentralization and unnecessary overlap can be seen as organizational mechanisms to ensure the broad, early search that a firm needs in order to cope with interactions among strategic decisions.