oligopoly

• Oligopoly


  An imperfectly competitive industry with a high level of market concentration. It relies on the interdependence of firms within a defined market.
• Concentration ratio


  Measures the combined market share of a leading group of businesses
• Examples of oligopolies


  • Airlines
  • High street banks
  • Broadband providers
  • Pharmacies
  • Cinema chains
• When an oligopoly's 5-firm concentration ratio exceeds 60%, it is an oligopoly. Anything below can be deemed as a monopoly