|Title||Cournot equilibrium uniqueness in case of concave industry revenue : A simple proof|
|Author(s)||Mouche, Pierre van; Quartieri, Federico|
|Source||Economics Bulletin 35 (2015)2. - ISSN 1545-2921 - p. 1299 - 1305.|
Economics of Consumers and Households Group
|Publication type||Refereed Article in a scientific journal|
A simple proof of an equilibrium uniqueness result by Murphy, Sherali and Soyster for homogeneous Cournot oligopolies with concave industry revenue function and convex cost functions is provided. Adapting this proof, a substantial improvement of their result is obtained; the improvement concerns capacity constraints, non-differentiable cost functions and industry revenue functions that are discontinuous at 0.