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Ceramic mosaic comic of a tapir combining two firms’ quantities labeled 5 and 9 into a market total of 14 at the same wage, while a snail asks to be counted.

Market Factor Demand: Add Quantities, Separate Cost Effects

Add firm input demands at a common wage. Separate substitution, output and cost-share effects, work examples and try three original questions.

Carved wooden puppet theater with a walrus comparing added revenue and added cost, a stoat noting that a tie can be OK, and a sleepy hedgehog backstage.

MRP and MRC: Use the Marginal Hiring Rule

Compare added revenue with full hiring cost. Work through discrete choices, tied profit levels and wage changes, then try three original questions.

Marginal Revenue Product Combines Productivity and Output Value

Marginal Revenue Product Combines Productivity and Output Value

Two-color linocut comic of a frog potter comparing chosen output with minimum-ATC output while a newt points out the quantity comparison among differentiated mugs.

Excess Capacity: Zero Profit, Markup and Minimum ATC

Watercolor comic of a pelican barber and new porcupine stylists offering differentiated services, with a tortoise accountant checking all economic costs.

Entry and Economic Profit in Monopolistic Competition

Kiwi gelato seller and lemur accountant compare quantity, price and costs in an original comic illustration.

Short-Run Price and Output in Monopolistic Competition

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

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

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

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