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Market structure and Schumpeterian growth

  • Lambson, Val E.
  • Phillips, Kerk L.

We present a discrete-time version of an otherwise standard Schumpeterian growth model. Discrete time exhibits two important differences from continuous time. First, the probability of successful innovation cannot be homogeneous of degree one in inputs. A natural R&D analogue to constant returns to scale implies a Poisson production function with diminishing marginal product of inputs. Second, R&D firms sometimes innovate simultaneously. The resulting market conduct is critical. We consider both Bertrand competition and collusion among successful innovators. Surprisingly, the industry demand for R&D inputs does not depend on the number of firms in the R&D sector if Bertrand competition ensues following ties. In contrast, demand for R&D inputs is higher if ties are expected to result in collusion. In general equilibrium, Bertrand competition leads to random switching between monopoly and competitive production. Under collusion, production is always at the monopoly level, but there is faster growth. Numerical simulations suggest that this also leads to higher welfare.

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Article provided by Elsevier in its journal Journal of Economic Behavior & Organization.

Volume (Year): 62 (2007)
Issue (Month): 1 (January)
Pages: 47-62

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Handle: RePEc:eee:jeborg:v:62:y:2007:i:1:p:47-62
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  1. Grossman, G.M. & Helpman, E., 1989. "Quality Ledders In The Theory Of Growth," Papers 148, Princeton, Woodrow Wilson School - Public and International Affairs.
  2. Segerstrom, Paul S & Anant, T C A & Dinopoulos, Elias, 1990. "A Schumpeterian Model of the Product Life Cycle," American Economic Review, American Economic Association, vol. 80(5), pages 1077-91, December.
  3. Aghion, P. & Howitt, P., 1990. "A Model Of Growth Through Creative Destruction," DELTA Working Papers 90-12, DELTA (Ecole normale supérieure).
  4. Deissenberg, Christophe & Nyssen, Jules, 1998. "A simple model of Schumpeterian growth with complex dynamics," Journal of Economic Dynamics and Control, Elsevier, vol. 22(2), pages 247-266, February.
  5. Aghion, Philippe & Howitt, Peter, 1992. "A Model of Growth Through Creative Destruction," Scholarly Articles 12490578, Harvard University Department of Economics.
  6. Robert E. Hall, 1986. "The Relation Between Price and Marginal Cost in U.S. Industry," NBER Working Papers 1785, National Bureau of Economic Research, Inc.
  7. Phillips, Kerk L., 1993. "Quality ladders, growth, and R&D: an assessment from U.S. industry," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 38(1), pages 239-273, June.
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