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An industry is comprised of four firms with sales of: $600 million, $800 million $1 billion, and $1

Marketing Jan 15, 2021

An industry is comprised of four firms with sales of: $600 million, $800 million $1 billion, and $1.2 billion. Calculate the industry's HHI.

Expert Solution

The industry's HHI is 0.2654.

To find the HHI, we first comptue the market share of each firm. The total market value in the industry is:

  • 600 + 800 + 1000 + 1200 = 3600 million.

The market share of each firm is:

  • 600 / 3600 = 16.67%
  • 800 / 3600 = 22.22%
  • 1000 / 3600 = 27.78%
  • 1200 / 3600 = 33.33%

HHI is the sum of squared market shares, i.e.,

  • (16.67%)2+(22.22%)2+(27.78%)2+(33.33%)2=0.2654
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