Assume there are 12 firms in an industry. The percentage of total sales is given in the following table:
Firm Percentage of total sales
1 16
2 14
3 12
4 12
5 10
6 8
7 6
8 6
9 5
10 4
11 4
12 3
Calculate the HHI for this industry.
If firms 6 and 7 decide to merge, would this merger be challenged by the FTC? Why or why not?