For Educators · Consumer Choice
Consumer Choice for a monopoly
Built for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs. Simulate a monopoly live below — adjust the inputs and watch it respond, right in your browser.
Consumer ChoiceLive
indifference curves & budget
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A consumer maximizes utility subject to a budget. Indifference curves connect equally-satisfying bundles; the budget line shows what income affords. The best choice is where the budget line just touches the highest reachable indifference curve — the tangency where the marginal rate of substitution equals the price ratio. Change a price and watch the optimal bundle move.
Data Inspector
Optimal X12.5
Optimal Y16.7
Utility14.4
Governing equation
Reading this result: With Cobb-Douglas preferences the optimal bundle spends a fixed income share on each good — here 50% of income (50) buys X and 50% buys Y, no matter how prices move; a price only changes how many units that fixed budget buys.
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Frequently asked questions
- Is this good for educators?
- Yes — this version of "Consumer Choice for a monopoly" is framed for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.