Economics Is About People, Not Just Spreadsheets!

Why human behavior makes markets unpredictable and why models still matter.

When many people nowadays hear the word economics, they picture spreadsheets, equations, and complicated graphs. Many imagine that economics is like accounting, purely about numbers and fixed rules. But economics is not just the study of numbers. Economics is the study of human choices, and that makes it both fascinating and exciting to learn about.

The most unpredictable variable in economics is not inflation, GDP, or exchange rates. It’s people!

Humans don’t behave as they are described in theory. We don’t always act rationally, as we are expected to. We don’t always have the complete information that is necessary to make decisions. We can be emotional, impatient, social, and biased, and yet, these messy decisions collectively shape entire economies and financial markets. Once you understand that economics is about people, everything starts to make more sense: price changes, booms and recessions, inflation waves, even financial crises.

Let me give you a few examples of when, in real life, our irrationality plays a key role and shapes not only our lives but also markets.

1. Economics starts with scarcity and choices.

In microeconomics, students cover one of the first topics: SCARCITY.  

No one has unlimited money, time, energy, or attention. That means every decision involves a trade-off. When you choose one thing, you give up something else. Economists call this the opportunity cost.  Another term that every single student has to know is marginal utility. In graphs, referred to as (MU), is the additional satisfaction or benefit a consumer gets from consuming one more unit of a good or service. In most cases, marginal utility decreases as consumption increases, meaning each extra unit brings less satisfaction than the previous one (law of diminishing marginal utility).

Even everyday decisions are economic:

• If you work more hours → you earn more money, but you give up time for studying, rest, or relationships.

• If a government spends more on pensions, it might have insufficient funds  for education, healthcare, or infrastructure investments.

• If a company raises salaries, it might limit its investment budget.

So economics is not “math for fun.” It’s a structured way to understand how people and institutions make trade-offs.

2. The myth of the perfectly rational human

Traditional economic models often assume a rational decision-maker: someone who weighs all options logically and chooses what maximizes their benefit. That assumption is valuable because it provides a clean foundation. But the real world is not perfect. Behavioral economics, strongly influenced by psychologists like Daniel Kahneman and Amos Tversky, shows that people regularly deviate from “perfect rationality.” Instead, we take shortcuts and are often influenced by emotions and social cues.

Some famous behavioral patterns include:

• Loss aversion: Losing €100 feels more painful than gaining €100 feels good.

• Present bias: We value rewards today more than rewards in the future.

• Overconfidence: We overestimate our ability to predict markets or outcomes.

• Anchoring: Our decisions are influenced by irrelevant starting points (like “original price” before discount).

In finance, this matters a lot. A rational investor might say: “If my stock has bad fundamentals, I should sell.” But a human investor may hold it just to avoid realizing a loss, even if the rational decision is to exit.

3. Why models exist

Some people criticize economics because “models are unrealistic.” But that criticism misses the point.

Models are not meant to copy reality in every detail. They are meant to simplify reality so we can understand key mechanisms. A good model is like a map: a map doesn’t show every tree and building, but it helps you navigate a city.

Economists use models because:

• Reality has too many variables to analyze directly.

• Models allow us to isolate relationships.

• Models help us build forecasts and test scenarios for further analysis.

This is especially important in macroeconomics and central banking, where policy decisions depend not on today’s inflation, but on inflation 12–18 months from now.

4. Expectations: the invisible force driving the economy

One of the most “human” parts of economics is expectations. People do not react only to current economic conditions, but also to what they expect will happen in the future. For example, if individuals expect prices to rise, they may try to negotiate higher future wages to protect their purchasing power. Firms then have to respond to these higher wage demands by increasing their costs, which can lead to higher prices in the economy. In this way, expectations themselves can influence inflation.

Other example:

• If households expect prices to rise, they may buy more today.

• If firms expect demand to fall, they may reduce hiring or production.

• If investors expect interest rates to go down, bond prices rise.

This is why economists often say markets are “forward-looking.” It’s not simply news but  how people interpret news.

Economics, therefore, is not just about mathematics, Excel, or financial models. It is about understanding how individuals behave in an imperfect world. Economics is not a crystal ball. It doesn’t give perfect predictions because humans are not perfectly predictable. Economics offers something more valuable: frameworks for understanding. What makes economics truly powerful is this balance between a combination of logical frameworks and the unpredictability of human nature. Markets move not only because of us, but also because of our fear, confidence, expectations, and decisions made by millions of individuals every day.

So the next time you hear about inflation, stock markets, or economic growth, remember: behind every number is a human choice. And that is what makes economics endlessly fascinating.

*Disclaimer: The information presented in this article is intended solely for educational and informational purposes. It is based on concepts and knowledge acquired through academic study in economics and finance. The content does not constitute financial, investment, legal, or tax advice and should not be relied upon when making financial decisions. The authors are not licensed financial advisers, and readers should consult a qualified professional before making any investment or financial decisions.