On the existence of a unique price equilibrium for models of product differentiation

Article Abstract:

The existence of a unique price equilibrium for models of product differentiation are characterized by demand functions that depend on differences in prices and have log-increasing differences in own price and other prices, which implies that best response correspondences are increasing. The logarithm transformation theorem can be extended to models with homogenous demand functions, which characterizes representative consumer models.

Supply and demand

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Existence of equilibrium and comparative statics in differentiated goods Cournot oligopolies

Article Abstract:

The existence of pure symmetric Cournot equilibria is established using an ordinal approach, for homogenous or differentiated goods under a simple condition that generalizes the condition of weakly increasing returns. The asymmetric equilibria using a weak additional condition is found, and stability and regularity of equilibria from an ordinal view establish a weak notion of stability.

Comparative analysis

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Cournot versus Walras in dynamic oligopolies with memory

Article Abstract:

The impact of memory in Cournot oligopolies where firms learn through imitation of success is explored. The long-run outcome corresponds to any quantity between the Cournot one and the Watras one as long as memory includes at least one period.

Evaluation, Memory, Imitation

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