Found h Rank Page Order 5.1 The following table represents the market share percentage for each firm in a hypothetical industry. A B C E FG H Firm D Market Share 15 6 12 20 10 19 11 a. Calculate the four-firm concentration ratio for this industry. b. Calculate the Herfindahl-Hirschman Index (HHI) for this industry. c. Would the Justice Department consider this industry as unconcentrated, moderately concentrated, or concentrated? Why? d. Suppose firms B, D, and F wanted to merge. What would be the value of the HHI following this merger? Would the Justice Department most likely challenge this merger? Why or why not?

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