Unit 3: Are Businesses Efficient? Product Markets and Efficiency

Lesson 11a: Monopolistic Competition: Are Businesses Efficient?

Key Formulas

Herfindahl index = MARKET SHARE SQUARED HI = ms12 + ms22 + ms32 + ms42 + ms52 + . . . . .   " "means "sum" or "add all together" "ms" means "% market share"

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