Your economics laboratory.
Choose a world, make a prediction and discover the reasoning behind the diagram.
Market equilibrium
Supply, demand, consumer and producer surplus, taxes and subsidies.
20 scenarios & experiments
Market failure
Production and consumption externalities. Separate private incentives from social costs and benefits.
20 scenarios & experiments
Discover the economics behind the diagram.
Predict first. Test your idea. Explain what changed. Apply it to another market.
Open investigations
Find two different ways to raise price while reducing quantity. Or make demand and supply increase without changing price.
Capture a baseline, record both solutions and explain which assumptions they share.
The dashed grey curve is the starting position. The coloured curve shows your changed condition.
Model assumptions
Linear competitive market: demand P = a − bQ, supply P = 10 + 0.7Q, initially a = 100 and b = 1 unless stated. Other factors stay fixed. External cost is constant. Tax models exclude externalities unless stated. These are illustrative units, not real data.
Make your prediction
Observe → explain → evaluate
Your writing is saved for reflection; it is not automatically graded.