Question

5. Interpreting concentration ratios

5. Interpreting concentration ratios

The following table shows the four-firm concentration ratios of various industries.

IndustryFour-Firm Concentration Ratio
Aerospace products and parts55.6
Cigarettes98.9
Greeting cards80
Petroleum and coal products34.1
Breakfast cereals85


Based on the data presented in the table, which of the following industries is the closest to perfect competition?

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