We show that even in very simple oligopolies with differential information a (Bayesian) Cournot equilibrium in pure strategies may not exist, or be unique. However, we find sufficient conditions for existence, and for uniqueness, of Cournot equilibrium in a certain class of industries. More general results arise when negative prices are allowed.
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Paper provided by Universidad Carlos III, Departamento de EconomÃa in its series Economics Working Papers with number
we070603.