Welcome to Information Failure!
Ever bought a sandwich thinking it would be delicious, only to find out it was soggy and tasteless? Or maybe you’ve ignored your homework because you didn't realize how much it would help your grades later on? In Economics, these are examples of Information Failure. In this chapter, we are going to explore why markets don't always work perfectly when people don't have all the facts. Don't worry if this seems a bit abstract at first—we’ll use plenty of real-world stories to make it clear!
1. What is Information Failure?
In a perfect world (which economists call a "perfectly competitive market"), everyone has perfect information. This means buyers and sellers know everything about the product, the price, and the quality. However, in the real world, this rarely happens.
Information failure occurs when people lack the information needed to make a rational decision. This leads to a misallocation of resources, which is a type of market failure. If you don't know how good or bad something is for you, you will end up buying too much or too little of it.
Symmetric vs. Asymmetric Information
• Symmetric Information: Both the buyer and the seller have the same amount of information. Example: You and a friend both know exactly how many stickers are in a pack you are trading.
• Asymmetric Information: One party has more or better information than the other. This creates an imbalance of power. Example: A doctor knows much more about your illness than you do.
Quick Review: The Basics
Information Failure = People make the "wrong" choice because they don't have the facts.
Market Failure = The market doesn't lead to the best outcome for society.
2. Asymmetric Information and Moral Hazard
This is where things get interesting! Asymmetric information is the root cause of many problems in markets like insurance, healthcare, and used cars.
The "Lemons" Problem
Imagine you want to buy a used car. The seller knows if the car is a "peach" (great condition) or a "lemon" (constantly breaking down). You, the buyer, can't tell the difference just by looking. Because you are afraid of buying a "lemon," you aren't willing to pay a high price. This might drive the sellers of "peaches" out of the market because they can't get a fair price, leaving only the "lemons" behind!
Moral Hazard
Moral hazard happens after a deal is made. It occurs when one person takes more risks because someone else will pay the cost if things go wrong.
Example: If you have "Full Tech Insurance" on your phone, you might be less careful about where you leave it or how you handle it, because you know the insurance company will give you a new one if it breaks.
Key Takeaway
Asymmetric Information is about what people know before a deal (like the used car seller). Moral Hazard is about how people behave after a deal (like the insured phone owner).
3. Merit and Demerit Goods
Information failure is a big reason why we have merit and demerit goods. This is a core part of your OCR H460 syllabus!
Merit Goods
Merit goods are goods that are better for us than we realize. They are under-consumed in a free market because people suffer from information failure—they don't fully appreciate the long-term benefits.
Example: Education. A student might not realize how much a degree will increase their lifetime earnings, so they might want to leave school early.
Demerit Goods
Demerit goods are goods that are worse for us than we realize. They are over-consumed because people ignore or don't understand the long-term private costs (and health risks).
Example: Sugary drinks. A person might enjoy the taste now but ignore the risk of tooth decay or diabetes in the future.
Did you know?
Governments often try to fix this information failure by using Information Provision. This is why you see "smoking kills" labels on cigarette packets or "traffic light" nutrition labels on food!
4. Market Failure Caused by Information Failure (The Diagram)
To show this in an exam, we use a Demand and Supply diagram, but we think of Demand as Marginal Private Benefit (MPB).
1. In a market with information failure, there is a difference between the Perceived Benefit (what the consumer thinks they get) and the Actual Benefit.
2. For a Merit Good (like health check-ups), the Actual benefit is higher than what the consumer perceives. Therefore, the "true" demand curve is further to the right than the current market demand. This leads to under-consumption.
3. For a Demerit Good (like junk food), the Actual benefit is lower than what the consumer perceives. The "true" demand curve is actually further to the left. This leads to over-consumption.
Memory Aid: The "Under/Over" Rule
• Merit goods = Under-consumed (We don't know how good they are).
• Demerit goods = Over-consumed (We don't know how bad they are).
5. Evaluating Information Failure
When you are asked to "evaluate" in your exam, you need to think about the "other side" or the limitations. Here are some points to consider for merit and demerit goods:
How well does the government fix it?
• Information Provision: Providing leaflets or adverts is cheap, but people often ignore them (especially teenagers!).
• Paternalism: Some people argue that the government shouldn't tell us what to do. If I want to eat five chocolate bars, is that "information failure," or just my personal choice?
• Difficulty in measuring: It is very hard for the government to calculate exactly how much "extra" benefit education provides, making it hard to set the right level of subsidy.
Summary Checklist
• Can you define Information Failure?
• Can you explain the difference between Symmetric and Asymmetric information?
• Do you know the difference between a Merit Good and a Demerit Good?
• Can you explain Moral Hazard with a real-life example?
• Can you explain why information failure leads to the misallocation of resources?
Don't worry if the diagrams feel a bit tricky at first. Just remember: if the buyer doesn't know the full truth, they can't make the best choice. That "bad choice" is what causes the market to fail!