Economic Theory

, Volume 5, Issue 1, pp 19–32

On the existence of pure strategy Bertrand equilibrium


  • Krishnendu Ghosh Dastidar
    • Centre for Economic Studies and Planning, School of Social SciencesJawaharlal Nehru University
Research Articles

DOI: 10.1007/BF01213642

Cite this article as:
Dastidar, K.G. Econ Theory (1995) 5: 19. doi:10.1007/BF01213642


The paper analyses the existence of pure strategy Nash equilibrium in price competition (or Bertrand equilibrium) in a homogeneous product market when costs are strictly convex and proves that if output is demand determined such equilibrium always exists. This paper also characterises such equilibria and shows that if firms are identical such equilibria are necessarily non-unique. However for firms with asymmetric costs it can be unique or non-unique.

Copyright information

© Springer-Verlag 1995