A discontinuous model of duopoly with isoelastic demand and innovation costs

Research output: Contribution to journalArticlepeer-review

  • Authors:
  • Fabio Lamantia
  • Mario Pezzino
  • Bruno Scardamaglia
  • Fabio Tramontana


The paper studies the dynamic properties of a duopoly game in which firms strategically compete in quality-enhancing innovation investments and quantities. Market demands are assumed to be isolastic (reciprocal to the price) functions. The non-linearity of the demand functions, as already highlighted by T. Puu in [11], suggests the existence of complicated dynamics (cyclical or chaotic) in a standard dynamic Cournot duopoly. In addition to this, competition in innovation introduces the presence of discontinuities in the best response functions, expanding the set of possible equilibria (including asymmetric and multiple ones) of the standard Cournot duopoly and further enriching the dynamic features of the model.

Bibliographical metadata

Original languageEnglish
JournalChaos, Solitons and Fractals
Publication statusAccepted/In press - 15 Mar 2022