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Pangolin cartographer and ibex scout examine patchwork share islands, entry and rivalry in an original paper-collage comic.

Market Concentration and HHI: What the Numbers Show

Calculate market concentration and HHI, check entry and rivalry, and work a merger example with three original interactive questions.

Two otter students and a snowy owl compare individual and group profit in an original glowing chalk-pastel comic.

Why Cartels Are Unstable: Individual vs. Joint Profit

See why cartels face an incentive to cheat. Compare individual and joint profit in a worked model, payoff matrix and three original interactive questions.

Fennec teacher and robot beetles use a two-by-two grid with A-first and B-second tokens in an original engraved comic.

How to Read a Payoff Matrix: Best Responses and Nash Equilibrium

Torn-paper comic with an aardvark shopkeeper, separate surplus and profit jars, a toucan pointing to fixed cost, and a snail beside a broken bridge of lost trades.

Consumer Surplus vs. Producer Surplus: Profit, Pricing and Deadweight Loss

Blueprint-style comic of a platypus plumber, one shared pipe network, a crab checking costs and an eel accountant explaining that infrastructure costs money.

Natural Monopoly Regulation: Marginal vs. Average Cost Pricing

Batik-style comic of a red panda selling identical stars through windows A and B while a ferret and owl explore whether buyers can resell.

Price Discrimination: Resale, Elasticity and Welfare

Scratchboard comic with a tapir potter, an ibis pointing to a profit jar, and a gecko imagining an unrealized beneficial bowl purchase.

Single-Price Monopoly: Output, Profit and Deadweight Loss

Clay comic quokka teacher, axolotl and snail compare a monopoly revenue and cost schedule.

Monopoly Schedule: Find Output, Price and Profit

Stained-glass comic hummingbird and orangutan guide two trains using demand and cost.

Why Monopoly Has No Supply Curve: Demand and Cost

Ink-wash opossum fruit seller and crab accountant compare an extra sale with revenue lost through a lower price.

Marginal Revenue and the Price-Cut Effect

Embroidered comic wombat inspects rules, cost and network hurdles as a stoat opens a new shop.

Barriers to Entry: Why One Seller Can Persist

Chalk comic tortoise adjusts factory output while a frog brings a new factory into the market.

Short-Run vs Long-Run Adjustment in Competition

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