Neoclassical economics

People buy and sell many things.

Sellers have things to sell. Buyers want to buy them. They work together to pick a price.

One idea helps us see how this works. It uses supply and demand. Supply is what is for sale. Demand is what people want.

When they meet, they find a price. This helps us use what we have. It shows why things cost different amounts.

This way of thinking is very common today. It helps us understand how we shop.

People buy and sell many things every day. One way to study this is called neoclassical economics. This idea is very common today. It helps experts study how people use what they have.

This way of thinking uses a supply and demand model. Supply is what sellers have to sell. Demand is what buyers want to buy. When they meet, they find a price. This helps explain why an apple costs less than a car.

This theory makes a few big guesses about people. First, it says people make smart choices. Second, it says people try to get the most value. Third, it says people use the facts they know. People want to get the most use from their money. Businesses want to make the most profit.

Some thinkers used different ideas before this. For example, older ideas said a product's value came from the work used to make it. Neoclassical thinkers say value comes from what people want. They also look at what people can produce. This can lead to a balance called a Pareto optimum. This is when a system works at its best.

Caption: A graph shows how supply and demand meet to find a price.

Neoclassical economics is a major way that experts study how people use resources. It focuses on how goods and services are made, used, and priced. This approach uses a model called supply and demand to explain how markets work. Supply is the amount of things that sellers have to offer. Demand is how much people want to buy those things. When these two forces meet, they help decide the price of an item.

This model helps answer big questions. It explains why an apple costs much less than a car. It also helps us understand why people earn wages for their work.

This way of thinking relies on a few main ideas about how people act. First, it assumes that people make rational choices based on what they value. Second, it says that individuals try to get the most utility, or satisfaction, from their money. Third, it suggests that people act using the information they have available. Businesses also follow specific goals in this model. Firms try to maximize their profits while dealing with production costs. By looking at these individual choices, economists can study how a whole economy works. This is often called microeconomics.

Many thinkers helped build these ideas over time. The term "neoclassical" was first used by Thorstein Veblen in 1900. Later, other experts like John Hicks and George Stigler used the term too. Many important names are linked to this school of thought. These include Alfred Marshall, Carl Menger, William Stanley Jevons, and Léon Walras. Jevons specifically looked at how a population uses its labor and land. He wanted to find ways to maximize the use of what people produce. These thinkers helped move economics away from older theories.

Before this, older theories like classical economics were more common. Those older ideas said a product's value came from the labor used to make it. Neoclassical thinkers changed this view. They use the utility theory of value instead. This means the value of an object comes from human preferences and productive abilities. It is about how much use a person gets from a thing. This approach also looks at how markets reach a balance. This balance is called an equilibrium.

Sometimes, markets do not work perfectly. This can happen because of things called externalities. An externality is a type of market failure. Economists also study a special point called the Pareto optimum. This was named after the discoverer Vilfredo Pareto. A Pareto optimum happens when an economy is in balance. At this point, society has reached its full potential for producing and consuming. Some economists use this to suggest that governments should stay out of markets. Others use different rules to decide if a change is good for everyone.

Neoclassical economics is a major framework used to study the production, consumption, and valuation of goods and services. It focuses on how markets function through the interaction of supply and demand. In this model, the price of an item is not random. Instead, prices are determined by how much people want a product and how much of it is available. This approach is the dominant way to study microeconomics, which is the study of individual parts of an economy. Since the 1950s, it has combined with Keynesian economics to form the neoclassical synthesis, which has led mainstream economic thought.

To understand how this system works, we must look at its core assumptions. Neoclassical theory rests on three main ideas about human behavior. First, it assumes people have rational preferences. This means they can identify and rank different outcomes based on their own values. Second, it assumes that individuals seek to maximize utility. Utility is a term for the satisfaction or usefulness a person gets from a choice. Third, it assumes people act independently using all available and relevant information. While individuals seek utility, businesses or firms seek to maximize their profits while managing production costs.

These assumptions allow economists to use the supply and demand model to analyze markets. This model uses a specific mechanism to explain prices. Buyers and sellers interact in a market, driven by their own preferences and productive abilities. Preferences include a person's tastes and choices, while productive abilities include their resources and technologies. Economists often use a graph to show these interactions. The supply curve and the demand curve meet at a specific point. This point represents the equilibrium, which is the balance where the amount supplied matches the amount demanded at a certain price.

One of the most important parts of this theory is the utility theory of value. This is a major departure from older economic schools. For example, classical economics and Marxian economics used the labor theory of value. That older view suggested a product's value came from the amount of labor required to make it. Neoclassical economics disagrees. It argues that value is determined by the marginal utility experienced by the user. This means the value of an object depends on how much satisfaction the next unit of that object provides to a person. Therefore, human preferences and productive abilities are the ultimate causes of all economic events.

History shows that many thinkers contributed to this field. The term "neoclassical" was first introduced by Thorstein Veblen in a 1900 article. He used it to describe the work of marginalists like Alfred Marshall. Other important figures include Carl Menger, William Stanley Jevons, Léon Walras, and John Bates Clark. Jevons, for instance, looked at how a population could use its labor and land to maximize the utility of its produce. Later, economists like John Hicks and George Stigler also used the term. Today, while it is often used as a synonym for mainstream economics, it excludes other views like institutional or Marxian economics.

Neoclassical economists also study when markets fail to reach a perfect state. One reason for this is the presence of externalities. An externality is a type of market failure where the outcome of a transaction affects others in ways not reflected in the price. To measure social welfare, economists use the Pareto criterion. This is named after Vilfredo Pareto. A Pareto optimum occurs when an economy is in a state of balance. At this point, the economy has reached its full potential output. In this state, it is impossible to make one person better off without making someone else worse off.

These theories have broad connections to how countries interact. For example, neoclassical economics supports the idea of free trade. This is based on David Ricardo's theory of comparative advantage. This theory suggests that free trade between two nations is mutually beneficial. It allows both countries to achieve the greatest total consumption possible. Because of the Pareto criterion, many neoclassical economists favor a laissez-faire approach. This means they often prefer that governments do not intervene in markets. However, some use the compensation principle, suggesting intervention is good if the total gains are larger than the total losses.