The Resource-Based View of the firm (RBV) is a set of related theories sharing the assumptions of resource heterogeneity and resource immobility across firms. In this view, a firm is a bundle of resources, capabilities, or routines which create value and cannot be easily imitated or appropriated by competitors due to isolating mechanisms. Grounded in the economic traditions of the “Chicago School” of economic efficiency, the “Austrian School” of economics, and organizational economics, the RBV comprises theories that explain the existence of (sustained) competitive advantage and of economic rents. Empirical research from this perspective addresses both firm performance and firm behavior at the level of business strategy (e.g., within-industry competition) and corporate strategy (e.g., acquisitions). Initially developed through a series of papers by several authors in the 1980s–1990s, major extensions and refinements of the RBV include the knowledge-based view of the firm (KBV), dynamic capabilities, and the relational view, which recognizes capabilities can be developed and shared through alliances between firms.