<< Chapter < Page Chapter >> Page >

How production costs affect supply

A supply curve shows how quantity supplied will change as the price rises and falls, assuming ceteris paribus so that no other economically relevant factors are changing. If other factors relevant to supply do change, then the entire supply curve will shift. Just as a shift in demand is represented by a change in the quantity demanded at every price, a shift in supply    means a change in the quantity supplied at every price.

In thinking about the factors that affect supply, remember what motivates firms: profits, which are the difference between revenues and costs. Goods and services are produced using combinations of labor, materials, and machinery, or what we call inputs    or factors of production    . If a firm faces lower costs of production, while the prices for the good or service the firm produces remain unchanged, a firm’s profits go up. When a firm’s profits increase, it is more motivated to produce output, since the more it produces the more profit it will earn. So, when costs of production fall, a firm will tend to supply a larger quantity at any given price for its output. This can be shown by the supply curve shifting to the right.

Take, for example, a messenger company that delivers packages around a city. The company may find that buying gasoline is one of its main costs. If the price of gasoline falls, then the company will find it can deliver messages more cheaply than before. Since lower costs correspond to higher profits, the messenger company may now supply more of its services at any given price. For example, given the lower gasoline prices, the company can now serve a greater area, and increase its supply.

Conversely, if a firm faces higher costs of production, then it will earn lower profits at any given selling price for its products. As a result, a higher cost of production typically causes a firm to supply a smaller quantity at any given price. In this case, the supply curve shifts to the left.

Consider the supply for cars, shown by curve S 0 in [link] . Point J indicates that if the price is $20,000, the quantity supplied will be 18 million cars. If the price rises to $22,000 per car, ceteris paribus, the quantity supplied will rise to 20 million cars, as point K on the S 0 curve shows. The same information can be shown in table form, as in [link] .

Shifts in supply: a car example

The graph shows supply curve S sub 0 as the original supply curve. Supply curve S sub 1 represents a shift based on decreased supply. Supply curve S sub 2 represents a shift based on increased supply.
Decreased supply means that at every given price, the quantity supplied is lower, so that the supply curve shifts to the left, from S 0 to S 1 . Increased supply means that at every given price, the quantity supplied is higher, so that the supply curve shifts to the right, from S 0 to S 2 .
Price and shifts in supply: a car example
Price Decrease to S 1 Original Quantity Supplied S 0 Increase to S 2
$16,000 10.5 million 12.0 million 13.2 million
$18,000 13.5 million 15.0 million 16.5 million
$20,000 16.5 million 18.0 million 19.8 million
$22,000 18.5 million 20.0 million 22.0 million
$24,000 19.5 million 21.0 million 23.1 million
$26,000 20.5 million 22.0 million 24.2 million

Now, imagine that the price of steel, an important ingredient in manufacturing cars, rises, so that producing a car has become more expensive. At any given price for selling cars, car manufacturers will react by supplying a lower quantity. This can be shown graphically as a leftward shift of supply, from S 0 to S 1 , which indicates that at any given price, the quantity supplied decreases. In this example, at a price of $20,000, the quantity supplied decreases from 18 million on the original supply curve (S 0 ) to 16.5 million on the supply curve S 1 , which is labeled as point L.

Questions & Answers

how to identify a perfect market graph
Adeola Reply
what is the effect of scarce resources on producers
Phindu Reply
what is economic
Charles Reply
what are the type of economic
macroeconomics,microeconomics,positive economics and negative economics
what are the factors of production
process of production
Basically factors of production are four (4) namely: 1. Entrepreneur 2. Capital 3. Labour and; 4. Land but there has been a new argument to include an addition one to the the numbers to 5 which is "Technology"
what is land as a factor of production
what is Economic
economics is how individuals bussiness and governments make the best decisions to get what they want and how these choices interact in the market
Economics as a social science, which studies human behaviour as a relationship between ends and scarce means, which have alternative uses.
how will a country's population be equal to it's labour force
Hope Reply
what is the meaning of ppf
Obeng Reply
What is Economic
Governor Reply
Economics is the social science that deals with the unlimited human wants in the face of scarce (limited in supply) resources.
what is market
Gift Reply
marker is the interaction of buying and selling
market refers to the interaction of the processes of buying and selling of commodities between the buyer and the seller.
market is a place where two parties gather to facilitate exchange of goods and services.
what are some good sources of information to find trends in various Industries
how do on know that marketing is going on
what is consumption
Using revenue
What is stock market
What are the marmet function
Odirile Reply
price elasticity of demand is the degree of responsiveness of a quantity demanded to the change in price of the commodity in question.
Gladys Reply
What does elasticity mean
Elasticity means change in demand with the change in price. It is elastic if the demand changes with the price change whereas it is inelastic if the demand is not affected due to change in price
I have a question
what is the importance of learning economics?
Thelma Reply
it helps to make the correct choice
it helps firm to produce products that will bring more profit
the difference between needs and wants
londiwe Reply
needs are things that we basically can't live without wants are just luxury things
needs are things without them we can't live but want are things without we can live
what is education
it's a process in which we give or receiving methodical instructions
what is mixed economy
what is a deadweight loss? how monopoly creates a deadweight loss?
Ashraf Reply
who are u?
what it this
hi y'all
how does group chat help y'all 🤔
hi y'all
how does group chat help y'all 🤔
how does group chat help y'all 🤔
to learn from one another
oh okay
what is type of economic
taiwo Reply
how to understand basics of economics
Aarif Reply
what is demand schedle
Princess Reply
When you make a Scedule of the demand you made

Get the best Principles of economics course in your pocket!

Source:  OpenStax, Principles of economics. OpenStax CNX. Sep 19, 2014 Download for free at http://legacy.cnx.org/content/col11613/1.11
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Principles of economics' conversation and receive update notifications?