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It could be a new game competing with Monopoly.
A duopoly is a market structure in which there are only two firms or companies that dominate the market and control the majority of the market share. In a duopoly, the two firms have a high degree of market power and are able to exert significant influence over prices, output, and other aspects of the market. Duopolies can arise in many different industries, such as telecommunications, transportation, and energy, and are often characterized by high barriers to entry and a lack of competition.