Tier 3 · AdvancedFree
Industrial Organization
Market Architecture
8 modules~65 min totalVerifiable certificate on completion
Syllabus
01Market Concentration: HHI and the CR4Math
11 min02Elasticity, Markups, and the Lerner IndexMath
12 min03Cournot Competition and Nash EquilibriumMath
12 min04The Concentration Trap
6 min05The Same Price, Different Buyer
6 min06The Empire's End
6 min07The Tipping Point
6 min08Regulate or Replicate
6 minFrom Module 1 — read a sample
The Herfindahl index = sum of squared market shares. A market with one firm at 100% has HHI = 10,000; ten equal firms gives HHI = 1,000. More concentrated = less competitive. Squaring is the key: it gives outsized weight to dominant players, so a market ruled by one giant scores far higher than a balanced one even with the same number of firms.
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