With an estimated market share of 37%, Atlas is the dominant company and the price leader in an  oligopolistic steel industry. The remaining market share is distributed equally between seven  companies. Suppose that one of those ten companies, Norton, attempts to gain market share by  undercutting the price set by Atlas.    Calculate the “Four Firm Ratio” and Herfindahl-Hirschman Index “HHI” in the above-described  market and interpret your answer. What model can best resemble this market? Briefly explain  this model. In your opinion, what will be the effect of Norton’s attempt described above on  Atlas’s market share: will it increase, decrease, or not affected at all?

Survey Of Economics
10th Edition
ISBN:9781337111522
Author:Tucker, Irvin B.
Publisher:Tucker, Irvin B.
Chapter9: Monopolistic Competition And Oligoply
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With an estimated market share of 37%, Atlas is the dominant company and the price leader in an 
oligopolistic steel industry. The remaining market share is distributed equally between seven 
companies. Suppose that one of those ten companies, Norton, attempts to gain market share by 
undercutting the price set by Atlas. 

 

Calculate the “Four Firm Ratio” and Herfindahl-Hirschman Index “HHI” in the above-described 
market and interpret your answer. What model can best resemble this market? Briefly explain 
this model. In your opinion, what will be the effect of Norton’s attempt described above on 
Atlas’s market share: will it increase, decrease, or not affected at all?

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