Competition and product innovation in dynamic oligopoly

Ronald L. Goettler, Brett R. Gordon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


We investigate the relationship between competition and innovation using a dynamic oligopoly model that endogenizes both the long-run innovation rate and market structure. We use the model to examine how various determinants of competition, such as product substitutability, entry costs, and innovation spillovers, affect firms' equilibrium strategies for entry, exit, and investment in product quality. We find an inverted-U relationship between product substitutability and innovation: the returns to innovation initially rise for all firms but eventually, as the market approaches a winner-take-all environment, laggards have few residual profits to fight over and give up pursuit of the leader, knowing he will defend his lead. The increasing portion of the inverted-U reflects changes in firm's investment policy functions, whereas the decreasing portion arises from the industry transiting to states with fewer firms and wider quality gaps. Allowing market structure to be endogenous yields different results compared to extant work that fixes or exogenously varies the market structure.

Original languageEnglish (US)
Pages (from-to)1-42
Number of pages42
JournalQuantitative Marketing and Economics
Issue number1
StatePublished - Mar 2014


  • Competition and innovation
  • Dynamic oligopoly
  • Inverted-U
  • R&D
  • Spillovers

ASJC Scopus subject areas

  • Economics, Econometrics and Finance (miscellaneous)
  • Marketing


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