The Herfindahl index would be 5000 if the only two firms in an industry have equal market shares.

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The Herfindahl index ranges from 0 to 10000, with 0 indicating perfect competition and 10000 indicating a monopoly. If there are only two firms in an industry with equal market shares, the Herfindahl index would be calculated as (0.5)^2 + (0.5)^2 = 0.5, which when multiplied by 10000 gives a Herfindahl index of 5000.

The Herfindahl Index Would Be 5000 If the Only Two