Price Determination in a Market Economy In a market economy, prices are determined by the interplay of supply and demand. This fundamental principle governs how...
In a market economy, prices are determined by the interplay of supply and demand. This fundamental principle governs how goods and services are allocated and valued in the marketplace.
The law of demand states that, all else being equal, as the price of a good or service increases, the quantity demanded decreases. Conversely, as the price decreases, the quantity demanded increases. This inverse relationship between price and quantity demanded is represented by the demand curve.
The law of supply states that, all else being equal, as the price of a good or service increases, the quantity supplied increases. Conversely, as the price decreases, the quantity supplied decreases. This positive relationship between price and quantity supplied is represented by the supply curve.
The equilibrium price and quantity are determined by the intersection of the supply and demand curves. At this point, the quantity demanded equals the quantity supplied, and there is no shortage or surplus in the market.
Problem: Suppose the demand curve for apples is represented by the equation Qd = 100 - 10P, and the supply curve is represented by Qs = 20P - 20, where P is the price per pound and Q is the quantity in pounds. Find the equilibrium price and quantity.
Solution:
Therefore, the equilibrium price is $4.33 per pound, and the equilibrium quantity is 56.7 pounds.
The market mechanism, through the forces of supply and demand, determines how resources are allocated in an economy. At the equilibrium price, resources are efficiently allocated, and there is no shortage or surplus. However, market failures, such as externalities or imperfect competition, can lead to inefficient resource allocation.
For more information on price determination and market equilibrium, visit BBC Bitesize GCSE Economics - Demand and Supply.