What Is Economics?
How people make, trade, spend, and save things of value — the science of choices.
The Science of Choices
Economics is the study of how people, businesses, and governments make decisions about using limited resources. Here's the core problem: people's wants are unlimited, but the resources to fulfill them (time, money, materials, labor) are limited. Economics studies how societies handle that gap — how they decide what to produce, how to produce it, and who gets what.
Goods, Services, and Needs vs. Wants
Goods are physical things you can touch: food, clothes, books, phones. Services are activities people do for others: teaching, doctoring, haircuts, bus driving. Together, goods and services make up everything an economy produces. Needs are things essential for survival: food, water, shelter, clothing. Wants are everything else — video games, vacations, fancy shoes. Understanding the difference between needs and wants is one of the most important financial skills you can develop.
Supply and Demand
Supply is how much of a product sellers are willing to offer. Demand is how much of that product buyers want. When demand is high but supply is low, prices go up (think concert tickets for a popular band). When supply is high but demand is low, prices drop (think winter coats on sale in July). This relationship — the law of supply and demand — is the single most important concept in economics. It explains why diamonds cost more than water, even though water is far more essential to life.
Money, Saving, and Spending
Money is just a tool that makes trading easier. Before money existed, people used barter — trading goods directly (three chickens for a new coat). But barter only works if both people want what the other has. Money solves this by serving as a universal medium of exchange that everyone accepts. Saving means setting money aside for future use. Investing means using money to buy something that you hope will grow in value over time. Both are strategies for making your limited resources work harder.
Why Economics Matters for You
Every decision you make involves economics — even if you don't realize it. Choosing to spend your allowance now vs. saving it for something bigger is an economic decision. Deciding whether to study for a test or play video games involves opportunity cost — what you give up by choosing one option over another. Understanding these concepts helps you make smarter decisions with your time, money, and resources for the rest of your life.
The concept of opportunity cost explains a famous puzzle: why do top lawyers hire someone to mow their lawn instead of doing it themselves? A lawyer earning $500 per hour could mow their own lawn in one hour for "free." But that hour of mowing costs them $500 in lost legal work. Hiring someone for $50 to mow saves them $450. The "cheapest" option isn't always what costs the least money — it's what costs the least value overall.
Last reviewed: April 2026