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Mapping a Sector’s Scope Transformation and the Value of Following the Evolving Core
A surprisingly neglected facet of sector evolution is the evolutionary analysis of firms’, and thus a sector’s, scope. Defining a sector as a group of firms that can change their scope over time, we study the transformation of U.S. banking firms. We undertake a sectoral, population-wide study of business-scope transformation, with particular focus on which segments banks expand into. As financial intermediation evolved, a continuously shifting set of activities became associated with “core banking,” with scope changing and relatedness itself (measured through coincidence) evolving ...