Fix the mistake: The Structure of the Economy and Us

The Structure of a Market Economy

The shopping and buying and selling that we do every day take place within a system called a market economy. How are the prices of goods determined? Let us consider this through the relationship between demand and supply.

Basic Knowledge

A market economy is an economic system in which the prices of goods and services are determined by the interaction of demand and supply in the market. Demand is the force that seeks to buy goods and services, while supply is the force that seeks to sell them. When prices rise, demand decreases and supply increases; when prices fall, demand increases and supply decreases. The point at which the quantity demanded and the quantity supplied are equal is called the equilibrium price. This price-adjustment mechanism is called the automatic adjustment function of prices (the invisible hand of God), which Adam Smith explained in The Wealth of Nations (1776). However, situations in which efficient resource allocation cannot be achieved even when the market is left to operate are called market failure. Typical examples of market failure include monopoly and oligopoly (situations in which one or a few firms control the market and competition does not function), negative externalities (problems in which costs are shifted to third parties, such as pollution), and public goods (things that are difficult for the market to supply, such as roads and lighthouses).

Further Study (Background and Significance)

Adam Smith used the metaphor of the “invisible hand of God” to argue that when individuals pursue their own interests, the interests of society as a whole are realized. However, perfect competition is difficult to establish in actual markets, and monopoly and oligopoly can give firms the power to control prices. In Japan, the Antimonopoly Act (1947) regulates monopolies, cartels, and unfair trade practices, while the Japan Fair Trade Commission is responsible for enforcement. Global environmental issues, such as CO2 emissions, have also attracted attention as typical examples of negative externalities, and policy responses such as carbon taxes and emissions trading are being explored. Market economies are highly efficient, but the government must play an essential role in addressing widening inequality and market failure.

Points to Note (Easily Confused Concepts)

① The basic forms are a downward-sloping demand curve and an upward-sloping supply curve. ② Distinguish between a monopoly (only one firm) and an oligopoly (a few firms control the market). ③ Distinguish between a negative externality (costs are shifted to third parties, such as through pollution) and a positive externality (a positive externality, such as the relationship between beekeeping and orchards). ④ Market failure is a problem with the market itself and is a different concept from a depression or recession.

Practice

1. What is meant by the “equilibrium price”? Explain it in terms of the relationship between demand and supply.
2. What kind of situation is “market failure”? Give and explain one specific example.
3. Explain Adam Smith’s idea of the “invisible hand,” and state why it does not function perfectly in actual markets.