How the economy works
What an economy is; producers and consumers; supply and demand; why prices change; the basics of how markets work
What a learner can do afterwards
- Explain what 'supply and demand' means using a simple example (ice cream on a hot day)
- Describe the difference between a producer and a consumer
- Give a reason why the price of something might go up or down
1 · Read
An economy includes how people make, share and use goods and services. Goods are things, such as bread. Services are work done for others, such as a haircut. Producers make goods or provide services. Consumers buy and use them. Buying is one part of the economy, as you learned in the shop lesson.
Mia's uncle grows strawberries to sell. He is a producer of strawberries. Mia's family buys and eats them, so they are consumers. Her uncle buys bread for his lunch. In that purchase, he is a consumer too. One person can be a producer in one trade and a consumer in another.
Demand describes how much buyers are willing and able to buy at different prices. Supply describes how much sellers are willing and able to offer at different prices. Wanting an item without being able to pay is not enough. Cones cost $2 on both days. On the hot day, eight buyers each want and can pay for one cone. If the shop offers six cones, two requests cannot be met. The cold day has two buyers.
Both days have the same $2 price. The bars count buyers.
When demand rises but supply stays the same, prices tend to rise. When demand falls, prices may fall. More supply with unchanged demand tends to lower prices; less supply tends to raise them. A delayed delivery can reduce supply. These are tendencies, not promises. Sellers may keep a posted price unchanged.
Compare amounts at the same price. More wanted than offered is a shortage. More offered than wanted is a surplus. Matching amounts are a balance, called equilibrium in a market model. Find a missing amount by subtracting what is offered from what is wanted. Nine buyers each want and can buy one basket, but six are offered: 9 - 6 = 3 baskets missing.
At this price, buyers want three more baskets than the seller offers.
A price change also affects buying. If other things, such as income and tastes, stay the same, a higher price usually means a smaller quantity demanded. A lower price usually means a larger quantity demanded. This is the law of demand. A price cut alone does not show that shoppers' tastes changed.
Producers offer goods and services; consumers buy and use them. Supply and demand affect prices, but prices do not always change at once.
Lesson, questions and flashcards written for this dataset.
Readings and extra questions written for this dataset. Economic references informed factual and question-design study; no source prose was copied.
More to read
A producer can be a consumer too
A baker makes bread for customers. Later, the baker pays a hairdresser for a haircut. The baker produces a good in one trade and consumes a service in another.
These words describe roles. They do not divide people into two permanent groups. The hairdresser may buy bread from the baker after work.
An economy includes the work people do, the things they produce, and how people obtain and use goods and services. Microeconomics studies choices made by individual households and businesses.
Check the price before comparing amounts
A stall offers six jars of jam at its posted price. Buyers want and can pay for nine jars in total. The stall cannot meet three requests. That is a shortage at this price.
If twelve jars were offered and nine wanted, there would be a surplus. If nine were offered and nine wanted, the amounts would match.
Keep the price attached to each comparison. Changing the price can change how many jars buyers want and how many sellers are willing to offer.
Fuel and the movement of goods
Crude oil is used to make fuels, including gasoline and diesel. Vehicles use these fuels to carry goods between producers and consumers.
As economies grow, more goods may need to be transported. This can increase demand for fuel and the crude oil used to make it. If oil supply does not keep up, that increased demand can put upward pressure on oil prices.
This is one possible explanation for changing fuel prices. A change at a gasoline pump, by itself, does not tell us which part of supply or demand changed.
A cheaper price or a new preference?
A shop cuts the price of a puzzle. Some customers who liked it before can now afford it. They may buy more even though their tastes have not changed.
A different event would be a new interest in puzzles. Customers might then want more puzzles at the old price as well as at other prices. That would be a change in demand.
Ask what the story tells you. A price cut is evidence that the price changed. It is not proof that customers developed a new preference.
2 · Watch
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Where it sits
Learn first
Optional connections
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
14 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.