Changes in equilibrium price and quantity: the four-step process
https://www.khanacademy.org/economics-finance-domain/microeconomics/supply-demand-equilibrium/market-equilibrium-tutorial/a/changes-in-equilibrium-price-and-quantity-the-four-step-process-cnx
Changes in equilibrium price and quantity: the four-step process. Let's start thinking about changes in equilibrium price and quantity by imagining a single event has happened. It might be an event that affects demand—like a change in income, population, tastes, prices of substitutes or complements, or expectations about future prices.
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