These hollow corporations share the characteristic that the activities of the business have been pared down to the single link in the chain of production at which the corporation holds a distinctive capability and enjoys a competitive advantage. Richard Langlois, a business historian, identifies this as a key reason for the change in the corporate landscape, enabled by the growth of āmarket-supporting institutionsā which enabled entrepreneurs to easily access support for business functions where they didnāt have a comparative advantage. If the assembly line was the defining innovation in business method of twentieth-century manufacturing activity, the hollow corporation may be the defining innovation in business method of twenty-first-century digital activity.