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Introduction to Basics of Economics

Supply and Demand II

Supply and Demand

In the previous lesson, we introduced the concept of supply and demand, where the price and quantity of a good or service are determined by the interaction of the buyers and sellers in the market. In this lesson, we will expand on the topic of supply and demand and discuss how changes in supply and demand affect the market equilibrium price and quantity.

Factors Affecting Demand

One factor that can cause the demand for a product to increase is a change in consumer tastes and preferences. For example, if there is a growing trend for healthy eating, the demand for organic foods may increase. This would cause the demand curve for organic foods to shift to the right.

Another factor that can cause the demand for a product to increase is a decrease in the price of a complementary good. For example, if the price of peanut butter decreases, the demand for jelly may increase because people are more likely to buy jelly to go with their cheaper peanut butter.

On the other hand, a change in the price of a substitute good can cause the demand for a product to decrease. For example, if the price of beef increases, people may switch to buying chicken instead, causing the demand for chicken to increase and the demand for beef to decrease.

Factors Affecting Supply

The supply curve can also shift due to various factors. For example, if the cost of production decreases, a supplier can produce more of a good or service at the same price. This would cause the supply curve to shift to the right.

Government policies can also affect the supply curve. For example, if the government offers subsidies to farmers to produce more corn, the supply of corn would increase, causing the supply curve to shift to the right.

Changes in Equilibrium

When both the demand and supply curves shift, the market equilibrium price and quantity will change. If the demand for a good increases and the supply of that good decreases, the equilibrium price will increase, and the equilibrium quantity will decrease. If the demand for a good decreases and the supply of that good increases, the equilibrium price will decrease, and the equilibrium quantity will increase. If both the demand and supply for a good increase, the equilibrium quantity will increase, but it is unclear what will happen to the equilibrium price without more information about the magnitude of the shifts.

Conclusion

In summary, the interaction of supply and demand in the market determines the equilibrium price and quantity of a good or service. Changes in either the demand or supply curve can cause the equilibrium price and quantity to change.

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Supply and Demand I

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Elasticity of Demand and Supply

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