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Price

society Maturity 11-13 Next article →

A price is the amount of payment one person gives to another. This happens when someone wants a good or a service.

Wireless in-store price display at a clothing retailer in NJ
Wireless in-store price display at a clothing retailer in NJ

For some services, people use different names like "rent" or "tuition." Most people use money to pay these prices today. However, people can also use vouchers or even other goods. This is called barter exchange, and it is not very common now. In some hard times, people used cigarettes as a type of money.

The competitive price system adapted from Samuelson, 1961
The competitive price system adapted from Samuelson, 1961

Prices work by following the rules of supply and demand. Supply is how much of a product is available to buy. Demand is how much people actually want that product. If many people want an item, the price often goes up. If there is too much of an item, the price may go down. This helps balance how much is made and how much is used. Prices also send information to people about what is important. They can act as an incentive for people to make new things.

Many thinkers have studied how prices work over time. Adam Smith was a famous economist who studied a puzzle. He noticed that diamonds cost more than water. This is strange because water is needed for life. Diamonds are mostly just for decoration. Later, Carl Menger helped explain this using marginal utility. This idea says that value depends on how much a person wants something. Other thinkers like Karl Marx looked at labor. He thought the cost of making something was very important.

There are many specific ways to talk about prices. A seller might ask for an "offer price" first. The person who buys it then pays the "transaction price." When you borrow money, the price is called an interest rate. This is shown as a percentage. Sometimes, prices can even be negative. In April 2020, the price of crude oil became negative. This meant people had to pay others to take the oil away. This happened because there was no place to store it.

Prices are different from the cost of making things. Cost is what a seller spends on labor and materials. Price is what the buyer pays to get the item. Most businesses want the price to be higher than the cost. This helps them earn a profit for their hard work. Some stores use "price points" to keep things simple. For example, a dollar store might only use one price. Other stores might make all prices end in 99 cents. Even charities use prices to help raise money for their goals.

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