Summary
In a model with a nonatomic continuum of traders some of which behave strategically while the others remain price-takers, the set of Cournot-Walras equilibria coincides with the set of Walras equilibria. This property is no longer valid when the strategic agents are represented by atoms.
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It is a pleasure to acknowledge the stimulating discussions we had with R. Amir about the question examined in the present work.
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Codognato, G., Gabszewicz, J.J. Cournot-Walras equilibria in markets with a continuum of traders. Econ Theory 3, 453–464 (1993). https://doi.org/10.1007/BF01209696
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DOI: https://doi.org/10.1007/BF01209696