Since the earliest days of strategic management research, scholars have sought to measure and model the effects of top managers on organizational performance. A watershed moment in this effort came with the 1984 introduction of Hambrick and Mason’s upper echelon view and their contention that firms are a reflection of their top management teams (TMT). An explosion of research followed and hundreds, if not thousands, of manuscripts have since been published on the subject. While a number of excellent reviews of this extensive literature exist, a relative few have asked questions about the overall state and future of the field. We undertook this assessment in an effort to answer some key questions. Are we still making progress on the big questions that gave rise to the upper echelon view, or have we reached a point of diminishing returns with this stream of research? If we are at an inflection point, what are the issues that should drive future inquiry about top management teams?
Steven A. Stewart and Allen C. Amason
Margarethe F. Wiersema and Joseph B. Beck
Corporate or product diversification represents a strategic decision. Specifically, it addresses the strategic question regarding in which businesses the firm will compete. A single-business company that expands its strategic scope by adding new businesses becomes a diversified, multibusiness company. The means by which a company expands its strategic scope is by acquiring businesses, investing in the development of new businesses, or both. Similarly, an already diversified firm can reduce its strategic scope by divesting from or closing businesses. There are two fundamentally different types of corporate diversification strategy, depending on the interrelatedness of the businesses in the company’s portfolio: related diversification and unrelated diversification. Related diversification occurs when the businesses in the company’s portfolio share strategic assets or resources, such as technology, a brand name, or distribution channels. Unrelated diversification occurs when a company’s businesses do not share strategic assets or resources and do not have interrelationships of strategic importance. Companies can pursue both types of diversification simultaneously, and thus have a portfolio of businesses both related and unrelated. In addition to variations in the type of diversification, companies can vary in the extent of their diversification, ranging from business portfolios with very limited diversification to highly diversified portfolios. Decisions regarding the diversification strategy of a firm represent major strategic scope decisions since they impact the markets and industries in which the company will compete. Companies can increase or reduce their level of diversification for a variety of reasons. Economic motives, for example, include the pursuit of economies of multiproduct scale and scope, whereby per-unit costs may be lowered through the increase in sales volume or other fixed-cost reducing benefits associated with growth through diversification. In addition, companies may diversify for strategic reasons, such as enhancement of capabilities or superior competitive positioning through entry into new product markets. Similarly, economic and strategic reasons can motivate the firm to refocus and reduce its level of diversification when the strategic and economic rationales for being in a particular business are no longer justified. The performance consequences of corporate diversification can vary, depending on both the extent of the firm’s diversification and the type of diversification. In general, research indicates that high levels of diversification are value-destroying due to the integrative and complexity-associated costs that administering an extremely diversified portfolio imposes on management. Nevertheless, related diversification, where the company shares underlying resources across its business portfolio (e.g., brand, technology, and distribution channels), can lead to higher levels of performance than can unrelated diversification, due to the potential for enhanced profitability from leveraging shared resources. Corporate diversification was a major U.S. business trend in the 1960s. During the 1980s, however, pressure from the capital market for shareholder wealth maximization led to the adoption of strategies whereby many companies refocused their business portfolios and thus reduced their levels of corporate diversification by divesting unrelated businesses in order to concentrate on their predominant or core business.
Vinícius Chagas Brasil and J.P. Eggers
In competitive strategy, firms manage two primary (non-financial) portfolios—the product portfolio and the innovation portfolio. Portfolio management involves resource allocation to balance the important tradeoff of risk reduction and upside maximization, with important decisions around the evaluation, prioritization and selection of products and innovation projects. These two portfolios are interdependent in ways that create reinforcing dynamics—the innovation portfolio is the array of potential future products, while the product portfolio both informs innovation strategy and provides inputs to future innovation efforts. Additionally, portfolio management processes operate at two levels, which is reflected in the literature's structure. The first is a micro lens which focuses on management frameworks to boost portfolio performance and success through project-level selection tools. This research has its roots in financial portfolio management, relates closely to research on new product development and marketing product management, and explores the effects of portfolio management decisions on other organizational functions (e.g., operations). The second lens is a macro lens on portfolio management research, which considers the portfolio as a whole and integrates key organizational and competitive concepts such as entry timing, portfolio management resource allocation regimes (e.g., real options reasoning), organizational experience, and the culling of products and projects. This literature aims to set portfolio management as higher level organizational decision-making capability that embodies the growth strategy of the organization. The organizational ability to manage both the product and innovation portfolios connects portfolio management to key strategic organizational capabilities, including ambidexterity and dynamic capabilities, and operationalizes strategic flexibility. We therefore view portfolio management as a source of competitive advantage that supports organizational renewal.
Kathryn Rudie Harrigan
Concerns regarding strategic flexibility arose from companies’ need to survive excess capacity and flagging sales in the face of previously unforeseen competitive conditions. Strategic flexibility became an organizational mandate for coping with changing competitive conditions and managers learned to plan for inevitable restructurings. They learned to reposition assets and capabilities to suit their firms’ new strategic aspirations by overcoming barriers to change. Core rigidities flared up in the form of legacy costs, regulatory constraints, political animosity, and social resistance to adjusting firms’ strategic postures; managers learned that their firms’ past strategic choices could later become barriers to adapting corporate strategy. Managerial insights concerning how to modify firms’ resources changed the way in which they were subsequently regarded. Enterprises saw assets lose their relative productivity and value as mastery of specific knowledge become less germane to success. Managers recognized that their firms’ capabilities were mismatched to market or value-chain relationships. They struggled to adapt by overcoming barriers to change. Flexibility problems were inevitable. Even if competitive conditions were not impacted by exogenous change forces, sustaining advantage in a steady-state competitive arena became difficult; sustaining advantage in dynamic arenas became nearly impossible. Confronted with the difficulties of changing strategic postures, market orientations, and overall cost competitiveness, managers embraced the need to combat organizational rigidity in all aspects of their firms’ operations. Strategic flexibility affected enterprise assets, capabilities, and potential relationships with other parties within firms’ value-creating ecosystems; the need for strategic flexibility influenced investment choices made to escape organizational rigidity, capability traps and other forms of previously unrecognized resource inflexibility. Where entry barriers once protected a firm’s strategic posture, flexibility issues arose when the need for endogenous changes occurred. The temporary protection afforded by imitation barriers slowed an organization’s responsiveness to changing its strategy imperatives—making the firm rigid when adaptiveness was needed instead. A firm’s own inertia to change sometimes created mobility barriers that had to be overcome when hypercompetitive conditions arose in their traditional market arenas and forced firms to change how they competed. Where exogenous changes drove competitive conditions to become more volatile, attainment of strategic flexibility mandated the need to downsize the scope of a firm’s activities, shut down facilities, prune product lines, reduce headcount, and eliminate redundancies—as typically occurred during an organizational turnaround—while simultaneously increasing the scope of external activities performed by an enterprise’s value-adding network of suppliers, distributors, value-added resellers, complementors, and alliance partners, among others. Such structural value-chain changes typically exacerbated pressures on the firm’s internal organization to search more broadly for value-adding innovations to renew products and processes to keep up with the accelerated pace of industry change. Exploratory processes of self-renewal forced confrontations with mobility or exit barriers that were long tolerated by firms in order to avoid coping with the painful process of their ultimate elimination. The sometimes surprising efforts by firms to avoid inflexibility included changes in the nature of firms’ asset investments, value-chain relationships, and human-resource practices. Strategic flexibility concerns often trumped the traditional strengths accorded to resource-based strategies.
Mikko Ketokivi and Joseph T. Mahoney
Which components should a manufacturing firm make in-house, which should it co-produce, and which should it outsource? Who should sit on the firm’s board of directors? What is the right balance between debt and equity financing? These questions may appear different on the surface, but they are all variations on the same theme: how should a complex contractual relationship be governed to avoid waste and to create transaction value? Transaction Cost Economics (TCE) is one of the most established theories to address this fundamental question. Ronald H. Coase, in 1937, was the first to highlight the importance of understanding the costs of transacting, but TCE as a formal theory started in earnest in the late 1960s and early 1970s as an attempt to understand and to make empirical predictions about vertical integration (“the make-or-buy decision”). In its history spanning now over five decades, TCE has expanded to become one of the most influential management theories, addressing not only the scale and scope of the firm but also many aspects of its internal workings, most notably corporate governance and organization design. TCE is therefore not only a theory of the firm, but also a theory of management and of governance. At its foundation, TCE is a theory of organizational efficiency: how should a complex transaction be structured and governed so as to minimize waste? The efficiency objective calls for identifying the comparatively better organizational arrangement, the alternative that best matches the key features of the transaction. For example, a complex, risky, and recurring transaction may be very expensive to manage through a buyer-supplier contract; internalizing the transaction through vertical integration offers an economically more efficient approach than market exchange. TCE seeks to describe and to understand two kinds of heterogeneity. The first kind is the diversity of transactions: what are the relevant dimensions with respect to which transactions differ from one another? The second kind is the diversity of organizations: what are the relevant alternatives in which organizational responses to transaction governance differ from one another? The ultimate objective in TCE is to understand discriminating alignment: which organizational response offers the feasible least-cost solution to govern a given transaction? Understanding discriminating alignment is also the main source of prescription derived from TCE. The key points to be made when examining the logic and applicability of TCE are: (1) The first phenomenon TCE sought to address was vertical integration, sometimes dubbed “the canonical TCE case.” But TCE has broader applicability to the examination of complex transactions and contracts more generally. (2) TCE could be described as a constructive stakeholder theory where the primary objective is to ensure efficient transactions and avoidance of waste. TCE shares many features with contemporary stakeholder management principles. (3) TCE offers a useful contrast and counterpoint to other organization theories, such as competence- and power-based theories of the firm. These other theories, of course, symmetrically inform TCE.