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Paper-collage squirrel inventor waters a plant while spray also benefits a rabbit’s flowers; a ladybug asks who else benefits.

Positive Externalities: Social Benefit and Corrective Subsidies

Separate private and social benefit, calculate a corrective subsidy, and compare quantity and policy costs. Try three original questions with explanations.

Scratchboard comic of a badger potter counting clay and fuel while kiln soot spots a fox neighbor’s washing; a mole asks about the neighbor’s cost.

Negative Externalities: Social Cost and Corrective Taxes

Calculate social cost, corrective taxes and welfare loss. Separate marginal damage, total harm and tax revenue, then try three original questions.

Cork-puppet workshop comic with one goose employer, mouse workers and a tortoise asking viewers to check the model before predicting minimum-wage effects.

Minimum Wage in Monopsony: Check Hiring Costs and Corners

Cyanotype comic of a raccoon conductor hiring an otter musician while a coin ribbon reaches existing band members and an owl counts the whole payroll.

Monopsony MRC: Calculate Hiring Cost, Then Read the Wage

Risograph forest labor fair contrasts many employers and duck workers with a penguin baker who takes the market wage as given and then chooses hiring.

Competitive Wage: Market Supply, Demand and One Firm’s Hiring

Embroidered felt comic of an armadillo unit detective multiplying output per worker by dollars per output while a gecko reminds readers to use the same period.

Marginal Revenue Product: Match Units Before Hiring

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

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

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

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