You have no doubt heard the expression that according to the law of supply price and quantity move when you have studied the rudiments of economics. This is a simple concept that comprehends how producers react to market changes in prices. Businesses tend to produce and sell more when the prices go up as they are able to make more profits. Once prices are low, producers will tend to supply less due to less profitability in sales.
The law of supply is one of the fundamental principles of economics. It aids in the understanding of why the markets act in a certain mode and why companies will decide to produce something in a particular way. Exceptions aside, the law tends to be true in competitive markets, and is the basis of our knowledge of supply.
Through this article, you will get to know what is meant by the law of supply, reason why the price and quantity move simultaneously, factors that govern supply, and how this concept works in your life.
Understanding the Law of Supply
According to the law of supply, at all other things being held constant, the higher the price of a good or a service, the higher the quantity supplied. Similarly, a reduction in price will result in a reduction in the quantity supplied.
This connection is in place due to the profit motivation of producers. Increasing the selling price will enable the companies to get additional revenue per unit sold. Consequently, they will be ready to make more goods or services.
Conversely, low prices lower the possible profits. Firms can reduce their output since producing more units is not so appealing.
This is a direct or positive relationship between price and quantity supplied according to economists. In comparison to the demand, where price changes in an opposite direction to the quantity, supply changes in the same direction.
As an example, we will have a farmer who grows strawberries. In the event that the price of strawberries in the market is high, the farmer might decide to produce additional strawberry plants in the coming growing season. But when the prices are dropping drastically, then the farmer might cut the production and concentrate on other crops that give more profit.
This fundamental concept justifies the fact that the law of supply states that price and quantity of supply move in the same direction in most markets.
Why Price and Quantity Move in the Same Direction
The primary aim of the law of supply is to maximize the profit. Any producer desires to get the best possible yield to investments he or she makes.
High prices allow businesses to finance production at a lesser cost and make higher profits. This can stimulate the manufacturers to produce more, employ more people, buy more materials or to increase the size of the production facilities.
Increased prices will also attract new businesses to join the market. With the increase in the number of firms that produce the same product, there is an increment in the aggregate market supply.
When prices go down, the reverse happens. The decreasing prices will decrease the profit margins that will make production less attractive. Other companies will cut production, others even stop producing the product altogether temporarily as they will not be able to meet their costs.
Take the case of a bakery that sells cakes. When customers are ready to spend more on cakes throughout the holiday season, the number of cakes that the bakery bakes on a daily basis will probably increase. But during the holidays, the bakery may hit the limit and lower prices thus reducing the production to prevent wastages and financial losses.
The law of supply is based on this relationship between profit and production.
Real Life Examples of the Law of Supply
The law of supply is observed in most industries and in day to day life.
Agriculture is one such typical example. During periods when the market prices are high, farmers tend to produce more crops. Assuming that the price of wheat will increase due to high demand, numerous farmers will use more land to produce wheat in the following season.
This principle is also exhibited by the housing market. When house prices go up, the construction firms construct more houses since the houses are going to fetch higher prices at which time the new construction is more viable.
The same is also true of technology firms. In case a new smartphone being released sells particularly well at high prices, the manufacturers will multiply the production to satisfy the customers and gain the maximum profit.
Another example is the energy markets. In cases where oil prices are very high, the energy companies tend to drill and produce more oil. When the price of oil is low over a longer duration, the firms might cut down on activities since it will no longer be profitable to produce oil.
Retailing businesses are also price takers. The stores stock more popular products during peak shopping seasons since with increased sales and reduced prices, the stores make more profit.
The following examples demonstrate the response of businesses in various industries to the change in prices.
Factors That Can Affect Supply
Although price is one of the most important factors affecting supply, it is not the only one. There are other factors which affect the extent to which the producers are willing and capable of supplying.
The cost of production is significant. In case of rise in the cost of raw materials, labor or transportation, any business might lower supply even in the case when sales prices are kept constant.
The issue of technology also impacts supply. New machine tools and enhanced production techniques enable firms to make higher quality goods at a low cost and hence, supply is high.
Production can also be affected by government policies. Business decisions concerning output are influenced by taxes, subsidies, regulations and import restrictions.
The natural conditions are of great significance to agriculture. Crops production may be impacted by weather events like floods, droughts, hurricanes or extreme temperatures and is independent of market prices.
The quantity of sellers in the market is also an issue. As additional businesses venture into a business, the aggregate supply tends to rise. With the exit of companies, there is a decrease in supply.
Supply can also be affected by future price expectations. Producers could temporarily offer a holding inventory rather than selling in the near future, when they think prices will go up.
These reasons make economists tend to use the phrase all other things being the same in their explanations of the law of supply.
Difference Between Supply and Quantity Supplied
Supply and quantity supplied are two different concepts which are not to be confused by many students.
The quantity supplied is the quantity that the producers are ready to offer at a certain price. When the price changes there would be movement along an existing supply curve.
Supply is the general correlation of prices and production. The whole supply curve moves when the price stays the same but other factors (e.g., technology, cost of production or government regulation) vary.
For example, when the price of coffee goes up, coffee growers would produce more coffee beans. This represents a change in quantity supplied.
Nevertheless, when there is new farming equipment that enables the growers to produce coffee more effectively, the production is greater even at the same prices. This is an increment in supply.
This difference is important as it allows students to correctly interpret economic graphs and examination questions.
Final Thought
One of the most significant notions in economics is summed up by the statement that, according to the law of supply, price and quantity variations are moving together. The producers tend to produce more when the prices are high since in this situation, more opportunities are generated to make profits. When prices are decreasing, the level of production will tend to reduce since with the decreased profits, it would not be so appealing to supply goods.
Despite all the other reasons that can contribute to the supply, price continues to play a significant role in the decisions on production. It is a concept applied by businesses, farmers, manufacturers, retailers and service providers alike in determining the quantity to produce.
The study of the law of supply is a great guide towards the study of markets, business and economic behavior. This principle not only gives a good idea of why producers react in the way they do to changes in price but also a good insight to why you need to study economics in school, or just listen to the reasons why producers react the way they do.
FAQs
According to the law of supply, how do price and quantity move?
Price and quantity supplied move in the same direction. Higher prices increase quantity supplied, while lower prices decrease it.
Why do producers supply more when prices rise?
Higher prices increase the potential for profit, encouraging businesses to produce and sell more.
What is the difference between supply and quantity supplied?
Supply refers to the entire relationship between price and production, while quantity supplied is the amount offered at a specific price.
Does the law of supply always apply?
It generally applies under normal market conditions, although unusual situations and market disruptions can create exceptions.
What factors besides price affect supply?
Production costs, technology, government policies, weather conditions, and the number of producers all influence supply.
Is the law of supply opposite to the law of demand?
Yes. The law of supply shows a direct relationship between price and quantity supplied, while the law of demand shows an inverse relationship between price and quantity demanded.
Why is the law of supply important?
It helps explain producer behavior, market pricing, production decisions, and how businesses respond to changing economic conditions.
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