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, price formation, and the impact of external factors like government policies or technological changes.
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 price and quantity.4
Shifts in demand or supply curves are caused by factors other than price, such as income, preferences, or production costs.5
Understanding demand and supply helps predict market responses to changes in economic conditions.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 due to the law of demand, which states that as the price of a good decreases, consumers are willing to buy more of it, assuming other factors remain constant.
What causes a shift in the supply curve?
A shift in the supply curve occurs due to changes in factors other than price, such as production costs, technology, or government regulations, which alter the quantity supplied at every price level.
What happens when demand exceeds supply?
When demand exceeds supply, a shortage occurs, leading to upward pressure on prices as consumers compete for limited goods or services.
Can demand and supply curves be linear?
Yes, demand and supply curves are often depicted as linear for simplicity, but in reality, they can take various shapes depending on market conditions.