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Intra-brand competition in a differentiated oligopoly.

Michèle Breton¹, Lucia Sbragia²

¹Department of Decision Sciences, HEC Montréal, Montreal, Canada.

Journal of Economics (Vienna, Austria : Online)

|February 11, 2021

Summary

This summary is machine-generated.

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This study examines differentiated oligopolies, analyzing how product substitutability and market composition affect competition and welfare. It identifies equilibrium market structures based on firms

Area of Science:

Industrial Organization
Microeconomics
Game Theory

Background:

Examines a differentiated oligopoly model with two product varieties supplied by two firm groups.
Considers Cournot competition dynamics within this market structure.

Purpose of the Study:

To analyze the sensitivity of Cournot solutions to product substitutability and market composition.
To investigate the welfare consequences of intensified competition.
To determine the equilibrium market composition driven by firm profit motives.

Main Methods:

Cournot competition analysis.
Sensitivity analysis regarding product substitutability and market composition.
Welfare consequence evaluation.
Identification of equilibrium market composition.

Keywords:

Cournot solution Differentiated oligopoly Equilibrium Intra-brand competition

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Main Results:

Results are expressed using the degree of product substitutability and a novel 'weighted relative efficiency' (WRE) parameter.
Market composition changes influence intra-brand competition intensity.
Identifies equilibrium market composition under profit-driven firm behavior.

Conclusions:

The study provides insights into the interplay of firm characteristics, market conditions, and competitive intensity in differentiated oligopolies.
Findings are generalizable through the WRE parameter, offering a unified framework for analysis.