question archive The table below shows the four-firm concentration ratio of various industries
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The table below shows the four-firm concentration ratio of various industries.
Industry | Four-firm concentration ratio |
---|---|
Petroleum and coal products | 34.1 |
Coffee and tea manufacturing | 52.5 |
Cigarettes | 98.9 |
Plastics and rubber product manufacturing | 10.5 |
Aerospace product and parts | 55.6 |
Which of the following industries is the closest to perfect competition?
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