3.3.3.2 - concentration ratios

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how to calculate n-firm concentration ratios

add together firms with the largest market share, eg. 3-firm = add together 3 firms, 5 firm = add together five firms

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significance of concentration ratios

- measures extent of market power held by the largest firms in an industry

- helps analyse the degree of monopoly/oligopoly (market structure analysis)

- govts can use concentration ratios to monitor industries for anti-competitive behaviour and enact policy accordingly

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