Respuesta :
The four-firm concentration ratio for the hamburger industry in this town is 94%
What is four-firm concentration?
The concentration ratio indicates whether an industry is made up of a few large companies or many small companies. A common concentration ratio is the four-firm concentration ratio, which consists of the market share of the four largest firms in an industry expressed as a percentage.
Add the total sales of the four largest companies in your chosen industry. Then divide that total by the industry's total sales. Converting that result to a percentage value yields the four-firm concentration ratio.
The concentration ratio can range from nearly zero for perfect competition to 100 percent for monopoly. A ratio greater than 40% is an indication of oligopoly. A ratio of less than 40% indicates monopolistic competition.
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