Have you ever asked yourself why a bottle of water costs less than a cup of coffee? Water is something we need to live, but coffee is just a drink we like. More than one hundred years ago, an economist named Carl Menger asked the same question. His answer changed the way we think about prices and value.
Let’s look at his main ideas with simple words and real examples.
1. Value Comes from People, Not from Things
Before Menger, many people thought the value of a thing came from the work or materials used to make it. Menger had a different idea. He said that value is not inside the object. It is in the mind of the person who wants it.
Think about this example. If you are walking in a hot desert, a bottle of water is very valuable to you. It might be worth more than a gold ring. But if you are in a jewelry shop, the gold ring costs a lot more. The water and the ring are the same objects. Their value changes because your needs and situation change.
2. The More You Have, the Less You Want It
Menger explained that the value of one more thing depends on how many you already have. Each new one gives you less happiness than the one before. Economists call this “diminishing marginal utility.”
Think about eating pizza. When you are very hungry, the first slice tastes amazing. It gives you a lot of happiness. The second slice is good too. But the fifth slice? Not so much. By the tenth slice, you probably do not want it at all. This is why you would not pay the same money for the tenth slice as you paid for the first. Your need for it is smaller.
3. Prices Are Made When Values Meet
Prices are not fixed by companies or by the government. They appear naturally when people exchange things. This happens when two people have different personal values.
Imagine you want to sell your old phone. You will only sell it if the money someone gives you is more useful to you than keeping the phone. The person who wants to buy it will only pay if the phone is more useful to them than their money. When you both agree, an exchange happens. That is how a price is made. It comes from both sides’ personal values.
4. It All Starts with the Person Who Buys
Menger also showed that things used to make other goods, like machines or raw materials, only have value because people want the final products. The value flows backward, from the final user to the producer.
Here is an example. Why does flour have value? Because we can use it to make bread. Why does bread have value? Because it takes away our hunger. So, the value starts with our need (hunger) and goes back to the material (flour). This idea is very important for understanding how production and supply chains work today.
5. Economics Is About People, Not Just Math
Menger believed that economics should start by looking at real human actions and choices. He did not want to only use mathematical models. He wanted to find the real reasons behind decisions. Why do people buy this and not that? Why do they save money? This way of thinking is called “causal-realistic economics.” It studies what people actually do, not just numbers on paper.
Summary of Menger’s Ideas
| Rule | What It Means | Simple Example |
|---|---|---|
| Subjective Value | Value depends on a person’s needs. | Water is more valuable in a desert than in a city. |
| Marginal Utility | The more you have, the less you want the next one. | The first slice of pizza is better than the fifth. |
| Price Formation | Prices come from people exchanging things they value. | Selling your used phone to someone who wants it. |
| Consumer Value Flow | Things for production are valuable because people want the final goods. | We value flour because it makes bread to eat. |
| Causal Realism | Economics studies why people make real choices. | Our everyday decisions are what drive markets. |