NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Waves of Creative Destruction: Customer Bases and the Dynamics of Innovation

Jeremy C. Stein

NBER Working Paper No. 4782*
Issued in June 1994
NBER Program(s):   CF

This paper develops a model of repeated innovation with knowledge spillovers. The model's novel feature is that firms compete on two dimensions: 1) product quality or cost, where one firm's innovation ultimately spills over to other firms; and 2) distribution costs, where there are no spillovers across firms and where incumbent firms' existing customer bases give them a competitive advantage over would- be entrants. Customer bases have two important consequences: 1) they can in some circumstances dramatically reduce the long-run average level of innovation; 2) they lead to endogenous bunching, or waves, in innovative activity.

*Published: Stein, Jeremy C. "Waves Of Creative Destruction: Firm-Specific Learning-By-Doing And The Dynamics Of Innovation," Review of Economic Studies, 1997, v64(219,Apr), 265-288.

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