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This Khan Academy page covers demand, supply, and efficiency in microeconomics.
Market equilibrium (article) | Khan Academy
The actual price you see in the world is a balancing act between supply and demand.
Minimum wage and price floors (video) | Khan Academy
Lesson 8: The effects of government interventions in markets. Rent control and deadweight loss. Minimum wage and price floors. Price and quantity controls. How price controls reallocate surplus. The effect of government interventions on surplus. Taxation and dead weight loss. Example breaking down tax incidence.
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Summary of market equilibrium, disequilibrium, and changes in equilibrium in macroeconomics.
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Trade and tariffs - Khan Academy
When governments impose restrictions on international trade, this affects the domestic price of the good and reduces total surplus. One such imposition is a tariff (a tax on imported or exported goods and services). See how a tariff impacts price, consumer surplus, producer surplus, tax revenue, and deadweight loss in this video.
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A firm in a perfectly competitive market might be able to earn economic profit in the short run, but not in the long run. Learn about the process that brings a firm to normal economic profits in this video.
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Unit 4: Consumer and producer surplus, market interventions, and international trade. Our mission is to provide a free, world-class education to anyone, anywhere. Khan Academy is a 501 (c) (3) nonprofit organization. Donate or volunteer today!
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Course: AP®︎/College Microeconomics > Unit 6. Lesson 4: The effects of government intervention in different market structures. Taxes for factoring in negative externalities. The effects of government intervention in different market structures.