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"Industry A has 10 firms. The five largest firms have 21%, 20%, 19%, 18%, and 17% of the market. The remaining five firms each have 1% of the market. The four-firm concentration ratio for Industry A is 78%. What is the HHI for Industry A

Respuesta :

Answer:

1820

Explanation:

The HHI is calculated by squaring the market share of each firm  in the industry.  

21% ²+ 20%² + 19%² + 18%² + 17%² + 1%² +1%² +1%² +1%² +1%² = 1820

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