This paper explains the concept of market equilibrium and its importance for business managers making decisions about pricing, supply levels, and product offerings. It introduces the supply and demand framework, illustrating how the two curves intersect at the equilibrium point where quantity supplied equals quantity demanded. The paper explores real-world examples — including gasoline price surges following hurricanes and end-of-season retail sales — to show how surpluses and shortages drive prices toward equilibrium. It also notes that the steepness of supply and demand curves varies depending on whether goods are essential or non-essential, and that equilibrium shifts as market conditions change.
It is essential that business managers understand the concept of market equilibrium and how it is reached. Understanding the concept can help with decisions regarding pricing for specific goods and services, as well as whether or not to supply those goods or services and at what level to supply them. To understand the concept and how it may be used, it is necessary to first examine what is meant by market equilibrium, and then consider the factors that may influence the way equilibrium is reached.
In any market there will be buyers who want to purchase goods or services and sellers who want to supply them. If a large number of people want to buy a good but only a few are selling it, those selling the good will be able to charge more. This pattern is seen when there is a shortage; one example is the way gasoline prices in the U.S. increase following major hurricanes. Retailers raise prices because, although not everyone can afford the higher price, there is a surplus of buyers relative to the fuel available — meaning the fuel can be sold at an inflated price for greater profit.
The converse is also true. Where there are not enough potential buyers to purchase all the goods available in a shop, the shop will reduce prices to stimulate interest and increase sales. This is commonly seen in end-of-season sales, where less popular goods are the ones discounted. These examples indicate that prices change depending on the supply and demand for a given good.
In economic terms, the relationship between supply and demand can be represented as a graph with two lines: one showing how demand behaves and one showing how supply behaves. The demand curve illustrates the typical pattern whereby, as the price of a good increases, fewer people want to buy it, decreasing the quantity demanded (Gillespie, 2010). On the graph, the demand curve shows that when the price is high, the quantity of goods demanded is low, but as the price decreases, the quantity that people want to buy increases.
The supply curve shows the opposite relationship. When the price for a particular good is low, suppliers are less attracted to selling that good compared to when the price is high, since a higher price offers an increased potential for greater profit margin. When both lines are placed on the same graph, they intersect. The point at which they intersect — point P — is the point of equilibrium, where the quantity supplied equals the quantity demanded. This intersection indicates the equilibrium price, as illustrated in Figure 1.
Figure 1: Supply and demand graph showing the point of equilibrium.
The angle of each line on the graph will vary depending on the type of good, because the rate at which supply or demand changes is influenced by the nature of the product. For essential goods such as gasoline or electricity, the rate of change in demand is likely to be more gradual compared to non-essential goods such as champagne. This concept is related to price elasticity of demand, which describes how sensitive consumers are to price changes for a given product.
"Curve steepness varies with essential versus non-essential goods"
"Equilibrium moves as market conditions change"
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