Market Competition Lab
Market Competition — Perfect to Monopoly
Market structure — the number and size distribution of firms in an industry — determines pricing power, output levels, and consumer welfare. This simulator lets you move along the spectrum from perfect competition (many firms, price-taking) through monopolistic competition and Cournot oligopoly to pure monopoly, updating price, quantity, profit, and deadweight loss at each step. The Cournot and Bertrand models for oligopoly are both available to highlight the strategic differences.
What you can do in this simulation
- Select market structure: perfect competition, Cournot oligopoly, Bertrand, or monopoly
- Adjust the number of firms in the Cournot model and observe price convergence
- Compare quantity, price, and profit across all structures on a single demand curve
- Visualize consumer surplus, producer surplus, and deadweight loss for each structure
- Set marginal cost and see how markup changes with market power
Concepts covered
monopoly · Cournot oligopoly · Bertrand competition · deadweight loss · market power · price-taking
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