Lesson 5 of 7 · 15 min

Industry structure: Porter's Five Forces

Porter's Five Forces explain an industry's long-run profitability: the threat of new entrants, the threat of substitutes, customer power and supplier power all feed the rivalry among existing competitors; intense forces mean low returns, benign forces mean high ones.

In short

  • The four outside forces (new entrants, substitutes, customers, suppliers) determine the rivalry among existing competitors, which sets long-run ROIC.
  • Entry barriers: network effects, economies of scale and scope, brand loyalty, switching costs, exclusive access to inputs or customers, government policy. Experience and expertise are not sustainable barriers.
  • Substitutes threaten when they meet the same need, are cheaper or improving, when customers can go without, and when switching is easy.
  • Customers are powerful when few and concentrated, products are standardised, the product is a large part of their budget, or they can backward-integrate; their power falls when the product is critical.
  • Suppliers are powerful when few, specialised or costly to switch away from, and when there are no substitutes for their products. Rivalry is high with price-war history, many equal-sized firms, undifferentiated products, high exit barriers and slow growth.

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Industry structure: Porter's Five Forces · Industry and Competitive Analysis