Welcome to the World of Contestable Markets!
In this section, we are going to explore one of the most interesting ideas in Economics: Contestable Markets. Most of the time, we judge how "competitive" a market is by counting the number of firms in it. However, the theory of contestability suggests that even if there is only one big firm (a monopoly), it might still behave as if it has hundreds of competitors!
We will learn why the threat of entry is sometimes just as powerful as actual competition, and how this affects the prices we pay every day. Don't worry if this seems a bit upside-down at first—we'll break it down step-by-step!
1. What is a Contestable Market?
A contestable market is a market where there is freedom of entry and exit. In these markets, new firms can enter easily, compete for customers, and leave without losing a lot of money if things don't work out.
The "Open Door" Analogy:
Imagine a room where a big giant (a large firm) is eating all the food. If the door is locked and bolted (high barriers to entry), the giant can eat as much as he wants and be as lazy as he likes. But if the door is wide open (a contestable market), the giant will eat quickly and behave himself, because he knows that at any moment, another giant could walk in and take his plate!
Key Features of a Perfectly Contestable Market:
- No Barriers to Entry or Exit: New firms can join the industry easily.
- No Sunk Costs: This is the most important part! We will explain this in the next section.
- Access to Technology: New firms have access to the same production methods as the old firms.
- Consumer Loyalty is Low: Customers are happy to switch to a new brand if it’s cheaper.
Quick Review: In a contestable market, it's not the number of firms that matters, but how easy it is for new firms to enter.
2. The Role of Sunk Costs
To understand contestability, you must understand Sunk Costs. These are costs that a business pays which cannot be recovered if they decide to leave the market.
Example: If you spend \$10,000 on advertising for your new shoe brand, and then the business fails, you cannot "sell" those adverts to get your money back. That money is "sunk."
Why do sunk costs matter?
High sunk costs act as a barrier to exit. If a firm knows it will lose millions of dollars just by trying to leave, it might be too scared to enter the market in the first place. Therefore, for a market to be highly contestable, sunk costs must be very low or zero.
Common Mistake to Avoid: Don't confuse fixed costs with sunk costs. A delivery van is a fixed cost, but you can sell it later to get money back (so it's not fully sunk). Advertising or specialized training for staff are almost always sunk costs.
Key Takeaway: Low sunk costs = Easy exit = High contestability.
3. "Hit-and-Run" Competition
When a market is contestable and an existing firm is making huge supernormal profits, new firms will perform what economists call Hit-and-Run Competition.
The Step-by-Step Process:
- A big firm in a contestable market starts charging high prices to make extra profit.
- New firms see these high profits and "hit" the market by entering quickly.
- They undercut the big firm's price, take the profit, and then "run" (exit) the market before the big firm can even react.
Did you know?
The airline industry on specific routes (like London to Paris) is often used as an example. If one airline raises prices, a low-cost carrier can easily move one of its planes to that route, take the profit, and move the plane elsewhere a month later if prices drop again.
4. How Contestability Affects Firm Behaviour
Because big firms are terrified of "hit-and-run" entry, they change how they act. Even if they are the only firm in the market, they will often:
- Lower their prices: To make the market look less attractive to new competitors.
- Improve Efficiency: To keep costs low so they can survive a price war.
- Increase Quality: To keep customers loyal so they don't switch to a "hit-and-run" entrant.
Encouraging Note: Think of it like a student who studies hard not because they have a test today, but because the teacher might give a surprise quiz at any time! The threat makes you work harder.
Key Takeaway: The threat of entry forces firms to operate closer to allocative efficiency (prices are lower for consumers) and productive efficiency (costs are kept low).
5. Summary and Memory Aids
The "3-S" Rule for Contestability:
To remember what makes a market contestable, think of the 3-S's:
- Sunk costs are zero.
- Supernormal profits attract "hit-and-run" entry.
- Substitutes are easy for consumers to find (low brand loyalty).
Quick Summary Table
Characteristic: Barriers to Entry
Contestable Market: Very Low/None
Characteristic: Barriers to Exit (Sunk Costs)
Contestable Market: Zero
Characteristic: Pricing Policy
Contestable Market: Lower prices (to stop entry)
Characteristic: Profits
Contestable Market: Only normal profits in the long run
Final Tip: When writing an essay on Monopoly, always mention Contestability as an evaluation point. Even a powerful monopoly might not be able to exploit consumers if the market is contestable!