Global organizations are inherently complex. The spatial dispersion of activities results in organizational subunits becoming embedded in local host‐country contexts that differ from their parents’ home country contexts. These subunits are also embedded in their parents’ corporate networks, causing them to differ from their locally embedded peers. The dual embeddedness and associated complexities create complex and often implicit boundaries. In addition, the contextual and operational diversity that affects the boundaries in global organizations are continually changing. Hence managing and coordinating across different inter‐ and intra‐organizational boundaries has emerged as an important capability for the success of global organizations. So far, we have a limited understanding of the factors that affect the complexity and effectiveness of the boundary spanning function. In this article, we focus on clarifying these key issues and propose a model for effective boundary spanning in global organizations.

Multinational enterprise (MNE) subsidiaries abroad are important organizations in their own rights. They typically hold some of the MNE's most critical resources, and operate at the forefront of complex international environments. In this review, we identify and organize theoretical and empirical research on subsidiary management based on over 600 articles in leading academic journals. We develop a conceptual framework that integrates complementary streams of theoretical and empirical research with the subsidiary as its focal unit of analysis. In particular, we review six lines of research on subsidiary scope, practices, knowledge management, engagement with local market and nonmarket actors, performance, and individuals within subsidiaries. We highlight theoretical perspectives that have contributed to, and been advanced by, research on MNE subsidiaries. Based on the review, we explore future research agendas, linking the contemporary research themes with two main thrusts. First, subsidiary management is a multi-level phenomenon that would benefit from more microfoundational research. Second, subsidiary management operates at key interfaces of technology paradigm shifts, and of disruptions in the political and institutional environment. Research into the dynamics of subsidiary management would thus enhance our understanding of international business in a volatile global economy. Journal of International Business Studies (2020) 51, 538-576.

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Research Summary: Digitalization has enabled firms with so‐called platform business models to emerge in many sectors of the economy. By facilitating transactions between different groups of users (e.g., buyers and sellers), platform firms are disrupting industries around the world. However, little is known about the international strategies of platform firms, as research has mostly examined platforms in single‐country contexts. We address this gap by integrating insights from platform research in strategy and economics—specifically the notion of network externalities—with internalization theory. We extend the existing typology of network externalities by distinguishing between within‐country and cross‐country network externalities. We derive testable propositions regarding the foreign entry modes of platform firms, their international strategic posture (multidomestic vs. globally integrated), as well as foreign market selection criteria and market exit. Managerial Summary: Many companies in the digital economy operate platform business models, which create value by connecting different groups of users, such as buyers and sellers. We examine how network externalities—the notion that a platform becomes more valuable to each user as more users join—influence the international expansion of these firms. We show that it is important to consider the geographic scope of network externalities, that is, whether network externalities operate across national borders or whether platform firms have to create separate user networks in each country. The distinction between within‐country and cross‐country network externalities affects key internationalization decisions, such as how to enter foreign markets, whether to pursue multidomestic or global strategies, how to select foreign markets, and when to exit from a foreign market.

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