Practice prompt · Q:economics-and-market-foundations/test-monopoly-claim-001

Test a one-brand monopoly claim

Requires buyer substitution, entry, seller constraints, and a separate legal analysis.

Updated Aug 7, 2026 Review due Nov 7, 2026

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One company is the sole seller of its named brand. Which response best tests a memo calling it an unconstrained and unlawful monopoly?

Choose the best answer. a Test buyer alternatives, product use, geography, period, entry and expansion, buyer power, regulation, capacity, and demand constraints; then open a separate current-law analysis if needed. b Define the market as the firm's brand, assume any announced price will maximize profit, and conclude illegality. c Use the firm's high accounting margin as conclusive proof that no substitutes or entrants exist.

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Answer: a

Choice a. Reconstruct the market and constraints before any structure claim, and keep law separate.