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市场类型分为完全竞争、垄断竞争、寡头垄断和完全垄断四种,这四种类型是随着市场成熟度不断提高而相互演化的。规律是竞争——垄断——竞争——垄断,这种周而复始的发展的。
The market types are divided into four categories: perfect competition, monopolistic competition, oligopoly and complete monopoly. These four types evolve with the maturity of the market. The law is competition - monopoly - competition - monopoly, this cycle of development.