Corporate or Product Diversification
Authors: Wiersema Margarethe F. , Beck Joseph B. 
Published: May 2016

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.