Practice prompt · Q:economics-and-market-foundations/evaluate-market-power-evidence-001

Triangulate market-power evidence

Rejects concentration, margin, and accounting segment shortcuts in favor of a mechanism and multi source evidence.

Updated Aug 7, 2026 Review due Nov 7, 2026

Practice

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A firm has a large reported segment, high accounting margin, and few named rivals. Which evidence plan best evaluates market power?

Choose the best answer. a Map the reported segment to the economic boundary, then triangulate substitution, shares, margins under a suitable cost concept, entry, capacity, duration, buyer power, conduct, and direct evidence while testing rival explanations. b A high reported margin proves durable market power because accounting income excludes every alternative explanation. c A large segment revenue share proves the firm can control price and has violated current law.

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Answer: a

Choice a. Build the mechanism and triangulate evidence, then reserve accounting and legal conclusions for their own standards.