Introduction to Supply and Demand+50 
Introduction to supply and demand refers to the fundamental economic concepts explaining how the quantity of goods or services offered by producers (supply) and the quantity desired by consumers (demand) interact in a market. The relationship between supply and demand determines prices and the allocation of resources. When demand increases and supply remains constant, prices tend to rise; conversely, if supply increases and demand remains unchanged, prices usually fall.
Introduction to Supply and Demand+50
Introduction to supply and demand refers to the fundamental economic concepts explaining how the quantity of goods or services offered by producers (supply) and the quantity desired by consumers (demand) interact in a market. The relationship between supply and demand determines prices and the allocation of resources. When demand increases and supply remains constant, prices tend to rise; conversely, if supply increases and demand remains unchanged, prices usually fall.
💡 Key Takeaways
- Define supply and demand and explain how their interaction sets market prices and allocates goods and services.
- Distinguish between movements along the curves and shifts of the supply and demand curves.
- Understand market equilibrium, including the equilibrium price and quantity, and how surpluses and shortages are resolved.
- Identify key determinants that shift supply or demand (income, prices of related goods, production costs, technology, expectations, number of buyers/sellers) and how those shifts affect equilibrium.
❓ Frequently Asked Questions
What is supply in economics?
Supply is the quantity of goods or services that producers are willing and able to offer for sale at various prices over a period of time.
What is demand in economics?
Demand is the quantity of goods or services that consumers are willing and able to purchase at various prices over a period of time.
How do supply and demand determine prices?
In a competitive market, price moves toward an equilibrium where the quantity supplied equals the quantity demanded. If prices are too high, a surplus occurs; if too low, a shortage occurs.
What causes the supply or demand curves to shift?
Non-price factors cause shifts: for demand, income, tastes, prices of related goods, expectations, and number of buyers; for supply, input costs, technology, prices of other outputs, expectations, and number of sellers.
What is equilibrium price, and what are surpluses and shortages?
Equilibrium price is where quantity supplied equals quantity demanded. A surplus is when price is above equilibrium (excess supply); a shortage is when price is below equilibrium (excess demand).