Expert Verified • Economics
Demand and Supply
The fundamental principles of microeconomics.
Demand and supply are fundamental concepts in economics that describe the relationship between the availability of a product or service and the desire for it among consumers. **Demand** refers to the quantity of a good or service that consumers are willing and able to purchase at various prices, typically represented by a downward-sloping curve. **Supply** represents the quantity producers are willing to offer at different prices, usually depicted by an upward-sloping curve. The intersection of these curves determines the **equilibrium price** and quantity in a market. Understanding demand and supply is crucial for analyzing market dynamics, predicting price changes, and formulating economic policies.
Quick Recall Points
1
Demand curves slope downward due to the inverse relationship between price and quantity demanded.2
Supply curves slope upward due to the direct relationship between price and quantity supplied.3
Equilibrium occurs where demand and supply curves intersect, balancing market forces.4
Shifts in demand or supply curves lead to changes in equilibrium price and quantity.5
Elasticity measures how responsive demand or supply is to price changes.Active Recall Challenge
Test your understanding before you leave.
What is the primary reason for the downward slope of the demand curve?
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Why does the demand curve slope downward?
The demand curve slopes downward because of the law of demand: as price decreases, consumers are willing to buy more of a product, and vice versa.
What causes a shift in the supply curve?
A shift in the supply curve occurs due to factors other than price, such as changes in production costs, technology, or government policies.
What is market equilibrium?
Market equilibrium is the point where the quantity demanded equals the quantity supplied, resulting in a stable price and quantity.
How does elasticity affect demand and supply?
Elasticity measures sensitivity to price changes. High elasticity means a small price change leads to a large change in quantity demanded or supplied, while low elasticity means the opposite.