Economics - Term 4 - Week 2

Think about where you buy your daily bread in Soweto or Polokwane. Sometimes, you have many choices—spaza shops, supermarkets, and street vendors. Other times, like when buying electricity from Eskom, there’s only one option. These situations show different market structures. A market structure is the way businesses in a market are organised and how they compete. For example, spaza shops in Khayelitsha compete fiercely, each trying to attract customers with lower prices or better service. This is close to perfect competition, where many sellers offer similar products. In contrast, Eskom is a monopoly: it’s the only supplier of electricity, so it sets the price. Understanding these differences helps you see why some prices are low and others high. A common misconception is that all shops compete the same way, but the number of sellers and their power changes everything.

Imagine a busy taxi rank in Durban with ten spaza shops selling cold drinks. Each shop sells similar brands at almost the same price. No single shop can set its own price much higher, because customers will just walk to the next shop. This is perfect competition: many sellers, identical products, and easy entry and exit. No one controls the market. In reality, perfect competition is rare, but spaza shops come close. The rule is: in perfect competition, the market—not the seller—sets the price. Sellers are price takers. If Sipho tries to charge R20 for a Coke when everyone else charges R12, he won’t sell much. The market structure keeps prices fair and profits low.

Now think about buying electricity in Mthatha. You can only buy it from Eskom. This is a monopoly: one seller, no close substitutes, and high barriers to entry. Eskom can set prices higher than in competitive markets, because customers have no alternatives. Monopolies often exist when it’s expensive for new businesses to enter, like building power stations. Monopolies can lead to higher prices and less choice. However, sometimes government allows them for essential services. A misconception is that monopolies are always bad. Sometimes, they provide services no one else can afford to offer. But usually, less competition means higher prices for consumers.

Think about mobile networks like Vodacom, MTN, Cell C, and Telkom. Only a few big firms control most of the market. This is an oligopoly: few sellers, similar or slightly different products, and significant influence over price. These firms often watch each other closely—if Vodacom drops prices, MTN may follow. Oligopolies can lead to price wars or, sometimes, collusion (illegal price-fixing). Monopolistic competition is different. Picture fast food outlets in Johannesburg—Kota shops, KFC, and local burger joints. Many sellers offer similar but not identical products. Each tries to stand out with taste, service, or location. They have some power over price, but not as much as a monopoly. The key is product differentiation.

Step 1: Identify the business. Example: Pick n Pay supermarket in Soweto. Step 2: List competitors. Other supermarkets: Shoprite, Spar, Checkers, plus spaza shops. Step 3: Compare products. All sell groceries, but each has unique brands and specials. Step 4: Check entry barriers. Opening a supermarket is expensive, but not impossible. Step 5: Decide the structure. Many sellers, similar but not identical products, some price control. Final answer: Pick n Pay operates in monopolistic competition. Sanity check: If Pick n Pay raises prices too much, customers can shop elsewhere. This fits monopolistic competition.

Step 1: Identify the market. Example: Mobile data in South Africa. Step 2: List main firms. Vodacom, MTN, Cell C, Telkom. Step 3: Observe pricing. Vodacom drops data prices; MTN soon follows. Step 4: Explain why. In oligopoly, firms are interdependent—one’s move affects the others. Step 5: Predict outcome. Price wars may occur, but sometimes firms avoid them to keep profits high. Final answer: In oligopoly, firms have some pricing power but must consider rivals’ actions. Sanity check: If only one firm acted, it would lose customers. The behaviour matches oligopoly.

Let’s practise together. Question: Lerato notices only one company provides water in her township. What market structure is this? Let’s think: Only one seller, no close substitutes, and high barriers to entry. That fits the definition of a monopoly, like Rand Water in Gauteng. So, the answer is monopoly. Now you try: Sipho sees many hawkers selling fruit at the taxi rank. What structure is this? Think about the number of sellers and the similarity of products. Since there are many sellers and the products are almost identical, this is perfect competition. Answer: Perfect competition.

Let’s walk through another example. Question: Ahmed wants to open a new fast-food outlet in Durban. He sees many competitors, each with their own menu and style. What market structure is this? Let’s reason: Many sellers, differentiated products, and each has some control over price. That’s monopolistic competition. Answer: Monopolistic competition. Now you try: Thandi sees only four major banks in South Africa. What is this? Think about the number of firms and their influence. Since there are only a few large firms, this is an oligopoly. Answer: Oligopoly.

1. List two examples of monopolies in South Africa, such as Eskom and Rand Water, and explain why they are monopolies. 2. Name one feature of perfect competition and provide a real-life example from your community. 3. State whether Eskom is a price taker or price maker, and explain your answer in one sentence.

1. Compare perfect competition and monopoly in terms of consumer choice, using examples from South Africa. 2. Classify the South African mobile network market by structure and justify your answer with at least two reasons. 3. Explain why spaza shops cannot set prices much higher than their competitors, using a scenario from your area.

1. Analyse how load-shedding might affect competition among supermarkets in a township, considering both pricing and customer loyalty. 2. Predict what would happen if a new company entered the mobile network market in South Africa, and explain the likely impact on prices and services. 3. Solve: If Shoprite and Spar both lower bread prices at the same time, what market structure does this behaviour suggest? Explain your reasoning with reference to oligopoly features.

• Perfect competition
• Monopoly
• Oligopoly
• Monopolistic competition

Answer: Perfect competition

Spaza shops have many sellers and similar products, fitting perfect competition. A common error is to confuse this with monopolistic competition, but products are not differentiated.

• Oligopoly
• Monopoly
• Perfect competition
• Monopolistic competition

Answer: Monopoly

Eskom is the sole provider of electricity, making it a monopoly. Some may think it's an oligopoly, but there are no close competitors.

• Identical products
• Few sellers
• Product differentiation
• One seller

Answer: Product differentiation

Monopolistic competition involves many sellers with slightly different products. Confusing it with perfect competition (identical products) is a common mistake.

• Ignore competitors
• Set prices independently
• Collude or compete closely
• Have no control over price

Answer: Collude or compete closely

Oligopolies watch each other and may collude or compete. Thinking they ignore competitors is incorrect.

• Many sellers
• Identical products
• Barriers to entry
• Price takers

Answer: Barriers to entry

Perfect competition has easy entry and exit. Barriers to entry are a feature of monopoly or oligopoly.

Answer: Oligopoly; because a few large banks dominate the market and have significant influence over pricing.