Lecture on Market Power and Barriers to Entry

Introduction to Market Power

• Definition: Market power is the ability of a firm to raise prices above marginal cost without fear of new entrants.
• Persistence: Competitive pressures typically erode market power unless barriers to entry exist.

Barriers to Entry

• Definition: Factors that make it costly for new firms to enter an industry.

Types of Barriers to Entry

1. Economies of Scale

   • Larger firms have lower average costs, allowing them to undercut smaller competitors.
   • Example: Car manufacturers, smartphone producers, and nail brands.
   • Extreme case: Natural monopolies where one firm can supply the entire market at lower cost.
     • Example: Public utilities like water supply.
   • Solutions:
     • Government ownership (e.g., Union Hills Water Treatment Plant).
     • Regulation (e.g., APS regulated by Arizona Corporation Commission).

2. High Fixed Costs

   • Significant initial investment required before producing goods/services.
   • Example: AT&T’s infrastructure for nationwide cellular service.
   • Historical Note: AT&T had a monopoly until the 1982 breakup.

3. Branding and Network Effects

   • Products become more valuable as more people use them.
   • Examples: Adobe PDFs, QWERTY keyboards, social networks like Facebook.
   • Strong network effects create significant barriers for new entrants.

4. Political and Economic Power

   • Case Study: Russian oligarchs and Vladimir Putin’s influence.
   • Example: Monopoly in the clove trade by Tommy Suharto in Indonesia.
   • Political connections can enhance market power through state favoritism.

5. Technological and Legal Protections

   • Initial technological advantages can provide temporary market power.
   • Patents: Protect innovations, encouraging R&D.
   • Legal Restrictions: Licensing requirements for professions (e.g., doctors, lawyers).

Government-Imposed Barriers

• Licensing and Regulation: Necessary but can limit new entrants.
• Legal Monopolies: Granted by the government (e.g., USPS for first-class mail, Federal Reserve for money production).

Conclusion

• Understanding barriers to entry is crucial to understanding how firms maintain market power and reap high economic profits.
• Both economic and political factors can contribute to these barriers, affecting competition and innovation.