Changes in Market Equilibrium | Summary and Q&A

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January 2, 2012
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Khan Academy
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Changes in Market Equilibrium

TL;DR

The video discusses how changes in supply and demand factors affect the equilibrium price and quantity of a product.

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Key Insights

  • 🍍 The invention of a disease-resistant apple increases the supply of apples, leading to a lower equilibrium price and an increase in equilibrium quantity.
  • 🍍 A study on the health benefits of apples increases the demand for apples, resulting in a higher equilibrium price and quantity.
  • 🍍 An advertising campaign for pear cider reduces the demand for apple cider, causing a decrease in equilibrium price and quantity.
  • 🍍 The unionization of apple pickers and wage increases decrease the supply of apples, resulting in a higher equilibrium price and a decrease in equilibrium quantity.
  • 🧑‍🏭 Changes in supply and demand factors can have varying effects on equilibrium price and quantity, depending on the magnitude of shifts in the curves.
  • 🧑‍🏭 These examples highlight the importance of considering both supply and demand factors when analyzing market dynamics.
  • 〽️ Altering customer preferences and input costs can significantly impact the supply and demand equilibrium of a product.

Transcript

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Questions & Answers

Q: How does the invention of a disease-resistant apple impact the supply and demand of apples?

The invention of a disease-resistant apple increases the supply of apples as growers can produce more. This leads to a shift in the supply curve to the right. The demand for apples remains unchanged.

Q: How does a study on how apples prevent cancer affect the demand for apples?

The study on how apples prevent cancer increases the demand for apples as more people prefer them. This results in a shift in the demand curve to the right. The supply of apples remains unchanged.

Q: How does an advertising campaign for pear cider affect the demand and supply of apples?

The advertising campaign for pear cider decreases the demand for apple cider as people start preferring pear cider. This leads to a shift in the demand curve for apples to the left. Additionally, if apple and pear growers are the same, they may switch to growing more pears, reducing the supply of apples and shifting the supply curve to the left.

Q: What happens to the equilibrium price and quantity if apple pickers unionize and demand wage increases?

If apple pickers unionize and demand wage increases, it raises the production costs for apple growers. As a result, the supply of apples decreases, shifting the supply curve to the left. The decrease in supply leads to a higher equilibrium price and a decrease in the equilibrium quantity of apples.

Summary & Key Takeaways

  • A new disease-resistant apple is invented, increasing the supply of apples and shifting the supply curve to the right.

  • A study on how apples prevent cancer is released, increasing the demand for apples and shifting the demand curve to the right.

  • The pear cider industry launches an ad campaign, reducing the demand for apple cider and shifting the demand curve to the left.

  • The apple pickers unionize and demand wage increases, leading to higher production costs and lower supply.

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