Oligopoly Market Examples and Industries

📚 Oligopoly Market: A Quick Study Guide

• 🤝 Definition: An oligopoly is a market structure in which a few large firms dominate.
• 🔢 Number of Firms: Characterized by a small number of firms.
• barriers to entry.
• 💱 Interdependence: Firms are highly interdependent; one firm's actions significantly affect the others.
• 📈 Price Setting: Firms have some control over prices (price makers).
• 📢 Non-Price Competition: Heavy emphasis on advertising, product differentiation, and branding.
• ⚙️ Examples: Common in industries like automobiles, telecommunications, and airlines.
• ⚖️ Herfindahl-Hirschman Index (HHI): Measures market concentration. HHI = $\sum_{i=1}^{n} s_i^2$, where $s_i$ is the market share of firm $i$. A high HHI indicates higher concentration.

🧪 Practice Quiz

1. Which of the following is a key characteristic of an oligopoly?
   1. Many small firms
   2. A single seller
   3. Few dominant firms
   4. Perfect competition
2. In an oligopoly, firms are typically:
   1. Independent of each other
   2. Highly interdependent
   3. Price takers
   4. Operating with no barriers to entry
3. Which of these industries is a common example of an oligopoly?
   1. Agriculture
   2. Restaurants
   3. Telecommunications
   4. Clothing retail
4. What is a common strategy used by firms in an oligopoly to compete?
   1. Price wars
   2. Perfect price discrimination
   3. Heavy advertising
   4. Ignoring competitors
5. The Herfindahl-Hirschman Index (HHI) is used to measure:
   1. Consumer surplus
   2. Market concentration
   3. Production costs
   4. Employee satisfaction
6. High barriers to entry in an oligopoly market typically result in:
   1. Increased competition
   2. More firms entering the market
   3. Fewer firms dominating the market
   4. Sustained profits for existing firms
7. Which of the following best describes price setting in an oligopoly?
   1. Firms are price takers
   2. Firms have no control over prices
   3. Firms have some control over prices
   4. Prices are determined solely by government regulation