Modularity and Organizations

Carliss Y. Baldwin

Chapter | International Encyclopedia of the Social & Behavioral Sciences | 2015

Modularity and Organizations

Abstract

Modularity describes the degree to which a complex system can be broken apart into subunits (modules) that can be recombined in various ways. Modularity is important for organizations and the economy because the boundaries of organizational units and corporations are likely to match the boundaries of underlying technological modules. (This correspondence is called "mirroring.") In this article, I explain the concept of modularity and describe how systems can be modularized. I then explain why mirroring is likely to be a commonly observed organizational pattern, review the empirical evidence, and conclude with open research questions.

Keywords: Complexity; Organizations;

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Baldwin, Carliss Y. "Modularity and Organizations." In International Encyclopedia of the Social & Behavioral Sciences. 2nd ed. Edited by James D. Wright, 718–723. Amsterdam: Elsevier, 2015.

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The purpose of this chapter is to investigate the means by which firms capture value in open platform systems. I begin by arguing that the surplus value created by complementarities within a technical system will be split among the owners of the unique and essential components—the strategic bottlenecks in the system. However, most platforms must also execute a series of steps that are subject to “flow production” bottlenecks. Finding and fixing these flow bottlenecks is another way to capture value. In addition, two types of platform improvements provide further opportunities for value capture. “Accelerators” speed up the processing of options, while “subsidiary” platforms increase the range of options available to users. Finally, members of a platform system or new entrants may seek to supplant the owner of a strategic bottleneck by “disintermediating” platform components. I describe four generic methods of disintermediation: substitution, reverse engineering, platform independent complements, and platform envelopment.

The purpose of this chapter is to use the theory of bottlenecks laid out in previous chapters to better understand the dynamics of an open standards-based platform. I describe how the Wintel platform evolved from 1990 through 2000 under joint sponsorship of Intel and Microsoft. I first describe a series of technical bottlenecks that arose in the early 1990s concerning the “bus architecture” of IBM-compatible PCs. Intel’s management of buses demonstrates how, under conditions of distributed supermodular complementarity, a platform sponsor can reconfigure the modular structure of a technical system, property rights within the system, and its own zone of authority to increase system-wide throughput, while protecting its own strategic bottleneck from disintermediation. I go on to describe how Microsoft used platform envelopment to establish a second strategic bottleneck in productivity software and later to respond to the threat of disintermediation from platform-independent internet browsers. I end the chapter by discussing the conditions under which shared platform sponsorship can be a long-term dynamic equilibrium.

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Modularity and Organizations

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