Skip to Main Content

Home Categories

Quiz Builder

Free quiz building from a large question library, with custom questions and first-party online play.

Pro

AI quiz building, image questions, private quizzes, and advanced export workflows for serious creators.

API

Authenticated API access for builders creating their own quiz apps, workflows, and integrations.

Color scheme

© QuestionStock

Library snapshot4,089 questions30 categories

All systems operational

Categories Features Quiz Builder Pro API

About Pricing Quizzes Support Contact

Status API docs Terms Privacy

What does the Herfindahl–Hirschman Index (HHI) measure in... | QuestionStock

Representative image for question: What does the Herfindahl–Hirschman Index (HHI) measure in market structure analysis?

Categories
Economics

What does the Herfindahl–Hirschman Index (HHI) measure in market structure analysis?

Easy

Create a free account to see more questions and build your own quiz.

What does the Herfindahl–Hirschman Index (HHI) measure in market structure analysis?

Options:

Market concentration calculated as the sum of squared market shares of all firms
The number of firms in a market without weighting by size
Average firm profitability across an industry
The variance of prices charged by competing firms

Correct answer: Market concentration calculated as the sum of squared market shares of all firms

Explanation: HHI sums squared market shares to measure concentration; U.S. merger guidelines treat markets with HHI above 2,500 as highly concentrated, a concrete DOJ/FTC threshold used in antitrust review.

Created 2026-03-10T18:50:04.981Z. Updated 2026-03-10T18:50:04.981Z.